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<article xmlns:xlink="http://www.w3.org/1999/xlink">
  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Enhancing Scientific Document Simplification through Adaptive Retrieval and Generative Models</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Artemis Capari</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Hosein Azarbonyad</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Zubair Afzal</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Georgios Tsatsaronis</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Elsevier</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Amsterdam</string-name>
        </contrib>
      </contrib-group>
      <pub-date>
        <year>2024</year>
      </pub-date>
      <fpage>9</fpage>
      <lpage>12</lpage>
      <abstract>
        <p>level. We find that few-shot prompting results in a higher performance on BLEU and SARI, but leads to a higher FKGL, as the simplified sentences in the provided test set have a higher FKGL as well. Conversely, lower FKGL can be obtained with zero-shot prompting, but will result in lower BLEU and SARI scores as well.</p>
      </abstract>
      <kwd-group>
        <kwd>eol&gt;Information Retrieval</kwd>
        <kwd>Scientific Documents</kwd>
        <kwd>Domain Adaptation</kwd>
        <kwd>Scholarly Document Processing</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Introduction</title>
      <p>
        The scientific community often utilizes specialized and complex terminology, making scientific
texts dificult to comprehend for the general audience [
        <xref ref-type="bibr" rid="ref1">1</xref>
        ]. With continuous developments in
many disciplines, even researchers and scientists find it increasingly dificult to stay up to date
with novel content and technical concepts. Studies have shown that the readability of scientific
literature is declining over time [
        <xref ref-type="bibr" rid="ref2">2</xref>
        ]. This trend presents both challenges and opportunities for
researchers and publishers to improve the readability of complex scientific information for a
broader audience.
      </p>
      <p>
        SimpleText Lab [
        <xref ref-type="bibr" rid="ref3">3</xref>
        ] is dedicated to addressing these challenges by making scientific content
more accessible. The lab’s primary objectives include identifying relevant passages in response
to user queries [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ], explaining complex terminology within these passages [
        <xref ref-type="bibr" rid="ref5">5</xref>
        ], and ultimately
simplifying the text to improve readability [6]. The initial step in this process is a passage
retrieval task known as "What is in (or out)?", where the goal is to retrieve all passages pertinent
to a given query or topic, which can then be used to create a simplified summary. In addition to
relevance, ranking models must also consider the complexity of passages, prioritizing those
that are easier to understand.
      </p>
      <p>Current state-of-the-art ranking models are based on semantic matching using either
crossencoder or bi-encoder architectures, or a combination of both [7]. These models are typically
trained on publicly available datasets like MS-Marco [8], which do not include scientific
documents. Since the SimpleText Lab’s retrieval task and associated training/evaluation sets are
centered around scientific literature, existing ranking models may underperform in this context
due to the complexity and specialized terminology of scientific documents.</p>
      <p>In this paper, we use our findings from our SimpleText participation of the previous year [ 9, 10]
to further expand our experiments. In our previous participation, we fine-tuned pre-trained
state-of-the-art ranking models [11, 12] on a set of unlabelled scientific documents using a
domain adaptation technique known as Generative Pseudo Labeling (GPL) [13] to retrieve relevant
documents for the SimpleText task. This method proved to be successful as our submissions
dominated the top of the scoreboard in the 2023 SimpleText Task 1 [9, 10]. Therefore, we
consider the models to be suficiently fitted to the data, and we rather aim to improve the input
given to the ranking model by generating new search queries using the provided queries, topics,
and abstracts.</p>
      <p>In addition to the first task, we also participated in the third task, "Rewrite this!", where the
objective is to simplify passages from scientific abstracts given a query [ 6]. We aim to test the
limits of prompt engineering on the text simplification task with GPT-3.5, developing prompts
with instructions at varying levels of detail, comparing zero-shot versus few-shot prompting,
and providing additional context for the sentence/abstract to be simplified within the prompt.</p>
      <p>The remainder of this paper is organized as follows: Section 2 reviews related work, Section
3 details the technical aspects of our system, Sections 4 and 5 present our empirical evaluations,
and Section 6 discusses the limitations of our current approach and suggests directions for
future research.</p>
    </sec>
    <sec id="sec-2">
      <title>2. Related Work</title>
      <p>
        In this section, we review the related work on the passage retrieval (SimpleText Task 1 [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ]) and
text simplification (SimpleText Task 3 [6]) tasks.
      </p>
      <sec id="sec-2-1">
        <title>2.1. Passage Retrieval</title>
        <p>The field of information retrieval (IR) has seen significant advancements with the introduction
of dense retrieval models. These models utilize fixed-length dense vector representations to
depict both queries and documents [14]. This approach enables eficient and precise extraction
of pertinent information from large text corpora, achieved by calculating the similarity score
between vectors representing queries and documents. Compared to conventional sparse retrieval
models like BM25 [15], dense retrieval models have exhibited superior performance in diverse
tasks, including document ranking and open-domain question answering.</p>
        <p>Bi-encoders and cross-encoders are two variants of dense retrieval models. Despite sharing
the common objective of capturing the semantic meaning of queries and documents into dense
vector representations, these two models difer in their neural network architecture. Bi-encoders
operate by independently encoding the query and document with two separate encoders into
dense vectors. These vectors are then compared using a similarity function, resulting in a
relevance score. A prominent example of bi-encoders is the Dense Passage Retrieval (DPR)
model [14]. DPR employs a two-stage retrieval process. Initially, a broad set of passages is
retrieved using sparse techniques. Subsequently, each passage is represented as a dense vector
using a pre-trained language model like BERT [16]. The query is mapped to a dense vector
representation as well. The final ranking of the passages is determined by the cosine similarity
between vectors representing the query and passage.</p>
        <p>On the other hand, cross-encoders use a single encoder to encode the query and document
into a shared embedding space. The documents are then ranked based on the similarity score
computed between this shared embedding and the learned representation of the positive
document. Cross-encoders can capture more intricate interactions between the query and the
document. However, they are computationally more demanding since they require a unique
embedding for each query-document pair. In contrast, bi-encoders separately encode queries
and documents, thus requiring only a single document corpus for all queries [11]. Consequently,
cross-encoders are typically used only as re-rankers [17, 18, 19, 20, 21, 22].</p>
      </sec>
      <sec id="sec-2-2">
        <title>2.2. Text Simplification</title>
        <p>When simplifying a text, multiple aspects are to be considered. One aspect is the Lexical
Simplification (LS), where complex terminology is replaced with simpler synonyms or
explanations. However, a sentence could still be grammatically complex, and therefore the Syntactic
Simplification (SS) should also be considered [23].</p>
        <p>The first attempts at automatic LS were rule-based approaches where texts were analyzed
and complex terms were identified, after which they were replaced with their most frequently
used synonyms [24]. Later rule-based LS approaches aimed to be more context-aware, using
methods that better capture semantic meaning such as context vectors [25, 26] or employing a
BERT model to generate and rank substitutions for complex words [27]. Data-driven LS uses
scientific methods and machine learning techniques to learn LS rules from large datasets, such
as English Wikipedia and Simple English Wikipedia. [28, 23, 29].</p>
        <p>Syntactic simplification also consists of both rule-based and data-driven approaches. Early
rule-based methods used handcrafted rules to split long sentences and simplify them, but often
failed due to complexities such as crossed dependencies and ambiguities [30, 23]. Improvements
were made by integrating a parser, Lightweight Dependency Analyzer (LDA), to learn
simplification rules from a corpus of sentences and their simplified versions [ 30, 23]. Subsequent work
focused on preserving text cohesion, syntactic dependencies, and multilingual applications,
but struggled to generalize across diferent sentence structures and languages [ 31, 32, 33, 34].
Data-driven methods, using large corpora and statistical models, enhanced the flexibility and
robustness of text simplification [35, 36].</p>
        <p>Deep learning techniques have advanced the field of text simplification in recent years. For
instance, Sequence-to-sequence (Seq2Seq) models with attention mechanisms [37, 38], have
been adapted for text simplification tasks. Nisioi et al. [39] demonstrated the efectiveness of
neural models in generating simplified text by training on large-scale datasets. These models can
capture complex linguistic patterns and produce more fluent and coherent simplified sentences
compared to traditional methods. Advancements in pre-trained language models [40] have
further improved automatic text simplification. These models, pre-trained on vast amounts of
text data, can be fine-tuned for specific tasks, including text simplification Martin et al. [41].</p>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>3. Methodology</title>
      <p>
        In this section, we outline the specific methodologies employed in this paper for the passage
retrieval and text simplification tasks in the context of SimpleText lab. In the first task [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ], our
aim is to adapt a passage retrieval model to the scientific domain and improve its performance.
For this purpose, we construct a validation dataset using a selection of scientific texts. We also
experiment with the Generative Pseudo Labeling (GPL) approach for unsupervised domain
adaptation. Finally, we focus on creating efective search queries using GPT-3.5 to improve
the performance of the retrieval model. For the text simplification task, we explore various
prompt-engineering techniques on GPT-3.5 to simplify a given text. The following sections
provide an in-depth description of these tasks and the rationale behind our chosen methods.
3.1. Task 1
In order to fine-tune and test our models, we initially construct a validation dataset utilizing a
selection of scientific texts annotated by subject matter experts. Subsequently, we use part of
this dataset, along with a large collection of scientific documents to fine-tune a dense-retrieval
model. This serves to make the model more suitable for scientific passage retrieval. We also
experiment with using LLM-generated search queries using abstracts as context.
      </p>
      <sec id="sec-3-1">
        <title>3.1.1. Test Collection</title>
        <p>The test collection [42, 43] is created using 100 queries dispersed through 20 distinct scientific
disciplines 1. Each query is specifically chosen to represent a recognized scientific concept, thus
enabling the collection of credible and pertinent passages. Following the selection of queries, we
employ the well-established pooling technique to retrieve candidate documents for annotation
for each query. Five distinct models (comprising two lexical matching, two bi-encoders, and
one cross-encoder) are selected for pool construction. These models are chosen based on their
performance on a small subset, or to ensure a variety of models, which in turn guarantees a
diversity of documents within the pool. We select 50 documents per query using the pooling
1Including Genetics and Molecular Biology, Computer Science, Economics, Agricultural and Biological Sciences,
Biochemistry, Econometrics and Finance, Toxicology and Pharmaceutical Science, Chemical Engineering, Veterinary
Science and Veterinary Medicine, Chemistry, Materials Science, Earth and Planetary Sciences, Engineering, Food
Science, Immunology and Microbiology, Mathematics, Nursing and Health Professions, Medicine and Dentistry,
Neuroscience, Pharmacology, Psychology, Physics and Astronomy, Social Science
approach. These documents are then classified by domain experts as "relevant", "partially
relevant", or "non-relevant". This curated dataset serves as the benchmark for assessing the
performance of various ranking models 2.
3.1.2. GPL
The Generative Pseudo Labeling (GPL) approach, originally introduced in [13], is an
unsupervised domain adaptation technique. This framework harnesses the architecture of a pre-trained
generative model to generate pseudo labels for unlabeled data within the target domain, creating
a training set suitable for supervised learning. This method has shown superior performance
compared to other unsupervised domain adaptation methods across various benchmark datasets,
and it has achieved state-of-the-art performance in the unsupervised domain adaptation of
dense retrieval.</p>
        <p>The importance of large data sets in training dense retrieval methods has been frequently
emphasized in previous research [16, 14, 7]. Given our manually annotated dataset, comprised of
only 5,000 snippets stemming from a set of 100 queries, we face a potential limitation. However,
we possess a vast reservoir of unlabeled scientific documents, including research articles, that
could provide an abundance of snippets and potential queries. These could be labeled through
GPL, based on their relevance, to fine-tune and adapt the extant ranking models to the task of
scientific document retrieval.</p>
        <p>We adapt the GPL framework to suit our specific needs by firstly eliminating the query
generation component (See Figure 1). Instead, we select a known set of scientific concepts per
domain, and subsequently identify all passages that refer to each concept within the documents.
This approach is predicated on the idea that the explicit mention of a scientific concept within a
document is a strong indicator of the document’s relevance to the concept. In this context, each
document that mentions a specific concept is considered a positive example. A bi-encoder is
then employed to determine negative examples for each query. The GPL framework employs
a cross-encoder as a ’teacher model’ to fine-tune the underlying bi-encoder model using the
collated positive and negative documents. This process enables the adaptation of the bi-encoder
model for our specific application - the ranking of scientific documents.
2The benchmark set can be found here https://github.com/acapari/KAPR</p>
        <p>For our use-case, we have fine-tuned two diferent bi-encoders msmarco-distilbert-base-v4[11]
(MS-DB-v4) and msmarco-distilbert-base-tas-b[12] (MS-DB-tas-b) using a subsection of our
benchmark set, spanning 20 diferent scientific domains, consisting of 4 queries each. We
augmented the training set with a large set of unlabeled passages. When testing performance
with the remainder of our benchmark set, we found that msmarco-distilbert-base-tas-b was
most suitable for tasks that require understanding of a wide range of domains. However, as the
SimpleText task aims at finding references in Computer Science, we have also fine-tuned the
aforementioned models on queries and articles from just the Computer Science and Mathematics
domains. Naturally, these models were fine-tuned on far less data (See Table 1). Each of the
models were fitted on pseudo labels created with ms-marco-MiniLM-L-6-v2, using the Adam
Optimizer [44] with a learning rate of 2e− 5 and 1000 warm-up steps.</p>
      </sec>
      <sec id="sec-3-2">
        <title>3.1.3. Generated Search Queries</title>
        <p>Several aspects are of importance when aiming to retrieve passages that are relevant for creating
a simplified summary around a given topic. One aspect, as described above, is the model used
to retrieve the passages. However, even with a high performing model, it is important how
you ask the model to retrieve those passages. We therefore employ GPT-3.5 to generate search
queries in two diferent set-ups. We first generate new topics using the provided abstracts only
(See Figure 2). We also generate new queries using the provided queries and abstracts with the
objective of finding a better search query to highlight a certain aspect of the article (See Figure
3). The generated search queries 3 are then used to retrieve a corpus of ElasticSearch top-k
documents, after which the same queries are used to re-rank the corpus with our fine-tuned
models.
3.2. Task 3
For the text simplification task, we explore the advantages and limitations of various
promptengineering techniques on GPT-3.5. We first design several prompts where we simply ask the
model to simplify a given sentence/abstract (See Figure 4, 6, and 7). Subsequently, we augment
these prompts with more detailed instructions on how to simplify a given input (see Figure 5, 9,
and 11).</p>
        <p>We also apply few-shot prompting, a frequently used technique that enables in-context
learning without the need to update model parameters [45, 46] by adding examples of the
desired input and output to the prompt. We use sentences/abstracts and their simplified versions
3The queries can be found on https://github.com/acapari/SimpleText_24_T1/</p>
        <p>Goal:
I have a task to retrieve passages that help understand a given article.
Request:
Your task is to help me write the best possible search query to retrieve
articles that would help understand the provided article.</p>
        <p>This query should be concise and focus on the provided topic.</p>
        <p>Only provide ONE search query.</p>
        <p>Article:
"{abstract}"</p>
        <p>Search Query:</p>
        <p>Goal:
I have a task to retrieve passages that help understand a given article.
We dissect the content of the article into key-topics, and retrieve
passages for those topics.</p>
        <p>Request:
I need your help to create the best possible search query for a given
topic in the context of the provided article.</p>
        <p>This query should be concise and focus on the provided topic.</p>
        <p>Only provide ONE search query.</p>
        <p>Topic:
{query_text}
Article:
"{abstract}"</p>
        <p>Search Query:
from the provided test set as sample input-output pairs in our few-shot prompts. As models are
biased by the order of the in-context examples [47], we randomly take  samples from the test
set and ensure that the selected samples are not from the same abstract as the input sentence
(see Figure 5, 8, 9, and 10).</p>
        <p>Finally, we explore two diferent methods for adding background information that can
potentially be used to help identify essential information that should be included in the simplified
text. The first method provides additional context to sentence-level simplification prompts by
simply including the abstract that the sentence to be simplified is extracted from. This can
potentially aid in avoiding overly simplified sentences as it shows the role of the sentence in a
bigger context (see Figure 8, 9, 10, and 11). Simplifying a text often involves breaking down and
explaining complex concepts. Our second method for adding background information therefore
involves a two-step process, where we first design a prompt where the task is to identify key
concepts in a given abstract and provide their definitions or more generally known synonyms.
We expect this method to aid with lexical simplification, in particular, [ 48] (see Figure 8). We
thus explore and combine the following methods:
• Simple zero-shot prompting (Figure 1, 3, and 4)
• Zero-shot prompting with detailed instructions (Figure 2, 6, and 8)
• Few-shot prompting (Figure 2, 5, 6, and 7)
• Adding background information to the prompt
– Adding abstract for sentence-level simplification (Figure 5, 6, 7, and 8)
– Generating and providing definitions/synonyms of key concepts (Figure 5)</p>
      </sec>
    </sec>
    <sec id="sec-4">
      <title>4. Experiments</title>
      <p>4.1. Task 1
In this section, we describe the details of the runs and the specific models used to produce the
results per run for Task 1 and Task 2.</p>
      <p>We have applied our models in several settings before selecting the final 10 submitted runs.
The selection was made based on the performance on the provided qrels and successes of
submissions from the previous year [10]. As shown in Table 2, the rankings were retrieved by
taking the top-k documents found for each query from he 2024 SimpleText Task 1 Train Qrels
by the Elastic Search API (top-100 for runs 1, 4, 8, and 10, top-500 for runs 2, 5, 7, and 9, and
top-1000 for runs 3 and 6). These were then re-ranked using our fine-tuned models. Runs 2
and 7 were obtained with MS-DB-v4-GPL-CS, a msmarco-distilbert-base-v4 model that was only
ifne-tuned on Computer Science and Mathematics data, while we used MS-DB-tas-b-GPL-al, a
msmarco-distilbert-base-tas-b model fine-tuned on all Science Direct Domains, for the remaining
runs.</p>
      <p>For runs 1, 3, and 7, the top-k documents were retrieved by searching for “query”, and then
re-ranked using one of our fine-tuned models, again using “query” as the query input, while run
9 simply uses “topic” as query input. A combination of the two inputs, namely “query, topic”,
was used as the query input for ranking and re-ranking runs 2, 4, 5, and 6. Finally, we included
two runs with generated query inputs with run 8 at query-level and run 10 at topic-level, both
using a top-100 ElasticSearch corpus and the MS-DB-tas-b-GPL-all model.
4.2. Task 3
Experiments conducted for Task 3 revolve around testing the limits of prompt engineering, by
comparing performance between simple and very detailed or multi-step prompts, zero-shot and
few-shot prompting, and sentence-level and abstract-level.</p>
    </sec>
    <sec id="sec-5">
      <title>5. Results</title>
      <p>In this section, we describe the details of diferent runs and the results for the passage retrieval
(Task 1) and text simplification (Task 3) tasks.
1
2
3
4
5
6
7
8
9
10
5.1. Task 1
5.1.1. Submitted Runs
For Task 1, we have partially selected the runs based on the performance of our submissions of
the previous year, where most of our submitted runs were produced using the MS-DB-v4-GPL-CS
model as it showed higher performance on the provided qrels [10]. However, oficial results
indicated otherwise, as our top-performing runs were obtained using the
MS-DB-tas-b-GPLall model [49]. We also found that “query, topic” was the best query input. However, the
evaluation on the provided qrels indicates otherwise. Following Table 4, run 1 ranks highest
across most metrics, which uses “query” as input and a corpus of top-100 ES documents. Last
year’s best-performing run, run 2, ranks second on the provided qrels. Increasing the number of
ES documents from 100 to 500 has a negative impact on @10, @50, and @100,
while increasing the corpus to 1000 ES documents worsens performance across all metrics.
Finally, the results suggest that using “query” as query input performs best, followed by “query,
topic”, while the generated inputs perform as some of the worst at rank 8 and 10. Query inputs
at topic level are the lowest-performing query inputs at rank 9 and 10.</p>
      <sec id="sec-5-1">
        <title>5.1.2. Oficial Results</title>
        <p>As per Table 5, where the results are sorted on the primary measure, nDCG@10, we see that
the rankings do not correspond with those of the Train qrels presented in Table 4. While the
generated query inputs, run 8 and 10, were ranked as some of the lowest, we see that they
perform as some of the best on the Test qrels. We further observe that run 4 performs slightly
better than run 10, both using the ES Top-100 corpus and MS-DB-tas-b-GPL-all, but using “query,
topic” and “gen topic” as query inputs respectively. While the generated topic still obtains better
results than most of our other submissions, we thus conclude that the “query”, both generated
in run 8 and original in run 4, provide an additional level of detail required when retrieving
relevant documents. “gen query” results in highest performance, followed by“query, topic” and
“gen topic”, while “query” and “topic” produce the lowest performing results. Furthermore,</p>
        <p>NDCG@10</p>
        <p>NDCG@20
runid
MS-DB-tas-b-GPL-all always outperforms MS-DB-v4-GPL-CS, and the optimal corpus appears to
be ES Top-100.
5.2. Task 3</p>
      </sec>
      <sec id="sec-5-2">
        <title>5.2.1. Submitted Runs</title>
        <p>When comparing the results in Table 6, we see a correlation between BLUE and SARI, but a
trade-of with FKGL. This can be attributed to the fact that BLUE and SARI are metrics that reflect
similarity between the predicted output and the reference, while FKGL reflects the required
education level to understand the text [50]. As the FKGL score for the provided simplified
sentences and abstracts is relatively high, i.e. 13.62 at sentence level and 13.38 at abstract
level, a lower FKGL score would naturally lead to a lower performance in BLUE and SARI.
This is further highlighted by the runs using few-shot prompting, where the provided samples
were used. The examples used in the prompt were of a higher education level, and therefore
the output sentences/abstracts are of a similar level. High FKGL scores were also obtained
with certain zero-shot prompts, namely runs 5 and 11. Run 5 includes a two-step process, and
run 8 has a very detailed prompt, while both include the entire abstract as additional context.
We suspect that these were factors that contributed to the generation of relatively complex
sentences instead of real simplifications. Shorter prompts containing fewer details and less
additional context on the other hand, lead to simpler generated sentences. As we observe with
runs 1, 3, and 4, which were generated with the simplest zero-shot prompts, have some of the
lowest FKGL scores. Run 3 in particular has a relatively low FKGL with the highest BLEU and
SARI scores.</p>
        <p>If we compare the performance of zero-shot prompts with their few-shot counterparts, i.e.
run 6 vs. run 12, run 7 vs. run 10, and run 8 vs run 11, we see that adding examples positively
impacts all metrics. When comparing runs 2 and 5 however, we see that adding examples to the
prompt negatively impacts FKGL on abstract level. This might indicate that the LLM is not able
to generalize the simplification task on abstract level when multiple abstracts from potentially
diferent articles are given as examples.</p>
        <p>Overall, our results indicate that the of-the-shelf LLM performs well in simplifying scientific
text, particularly at the sentence level. Interestingly, providing additional context around the
sentences does not enhance its performance in this task. This could be because the additional
context diverts the LLM’s focus from the individual sentence. When more context is provided,
the LLM may attempt to integrate information from multiple sentences, which can negatively
afect the quality of the simplified sentences and lead to more complex sentences.</p>
      </sec>
      <sec id="sec-5-3">
        <title>5.2.2. Oficial Results</title>
        <p>As per Table 7, where the results are sorted on SARI, we see that our submitted runs (e.g.
Elsevier ) dominate the top of the scoreboard on sentence-level simplification. We observe that
the results difer from our evaluation on the provided test set presented in Table 6, as run 1
ranked relatively low on SARI, while it ranks highest in the oficial results. However, it still
obtains the lowest FKGL score.</p>
        <p>The rankings show a correlation between the simplicity of the prompt, and the simplicity of
the generated sentences considering the runs with the simplest prompts, i.e. runs 1, 3, and 4,
0.6 0.01 0.27 0.54 8.51
1 1 0 0 8.8
0.59 0.00 0.45 0.53 8.39
0.63 0.00 0.37 0.50 8.54
0.63 0.00 0.35 0.50 8.66
0.64 0.00 0.38 0.47 8.63
0.63 0.00 0.35 0.51 8.67
0.63 0.00 0.35 0.50 8.67
0.68 0.00 0.23 0.46 8.68
0.63 0.00 0.34 0.50 8.67
0.56 0.00 0.48 0.58 8.45
0.53 0.00 0.53 0.56 8.51
0.51 0.00 0.60 0.56 8.34
0.41 0.00 0.76 0.12 8.61
0.52 0.00 0.53 0.62 8.45
0.77 0.11 0.16 0.32 8.70
0.30 0.00 0.89 0.14 8.30
0.46 0.00 0.69 0.33 8.86
0.32 0.00 0.87 0.14 8.32
0.30 0.00 0.89 0.14 8.30
0.44 0.00 0.71 0.34 8.85
0.47 0.00 0.66 0.29 8.89
0.46 0.00 0.54 0.73 8.25
0.38 0.00 0.80 0.42 8.72
0.45 0.00 0.70 0.41 8.87
0.43 0.00 0.56 0.78 8.17
0.43 0.00 0.57 0.78 8.17
0.69 0.03 0.05 0.44 8.71
0.93 0.13 0.11 0.13 8.73
0.87 0.14 0.17 0.14 8.68
0.79 0.06 0.29 0.12 8.63
0.72 0.03 0.34 0.37 9.06
0.89 0.32 0.02 0.16 8.73
0.95 0.00 0.22 0.11 8.65
0.96 0.59 0.02 0.07 8.77
1.00 0.99 0.00 0.00 8.80
obtain the lowest FKGL scores. Run 3 obtains the highest BLEU score at 15.75, indicating that
prompt 6 produces the sentences most similar to the test set.</p>
        <p>When comparing the performance of runs 7 and 10, where zero-shot and few-shot versions
of prompt 6 were used respectively, we see that the zero-shot version of the prompt performs
better. This indicates that the references used in the test set were of higher simplicity than the
provided examples. The same observation can be made on abstract level in Table 8, where run 2
and run 5 are zero-shot and few-shot versions of prompt 2 respectively.</p>
        <p>While few-shot prompting is typically used to boost performance, we can infer why our
submissions using zero-shot prompting obtain higher performance, as Table 7 shows that the
FKGL of the reference set is 8.86, while the FKGL of the references in the 2024 SimpleText Task
3 Test Set is 13.62. The examples used in our few-shot prompts were thus more complex than
the ones used in the oficial evaluation, which is in turn reflected in the performance of the
sentences generated with these few-shot prompts.</p>
      </sec>
    </sec>
    <sec id="sec-6">
      <title>6. Conclusion</title>
      <p>
        Building on the success of our participation in the 2023 SimpleText Task 1 [9, 10], where we
finetuned ranking models on a large collection of unlabeled scientific documents using Generative
Pseudo-Labeling (GPL) [13], our objective for the 2024 SimpleText Task 1 [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ] was to enhance the
search queries provided as input to these ranking models. We generated these search queries
with GPT-3.5 on both query and topic level, using article abstracts as context.
      </p>
      <p>
        While our submissions using this method achieved high rankings on the scoreboard in the
2023 SimpleText Task 1 [9, 10], our models did not outperform those of other teams in the 2024
SimpleText Task 1 [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ]. We hypothesize that this is due to the fact that the pool of rankings
used to create the reference set difers from the previous year, as it consisted of rankings from
many lexical search methods, while there was an increased use of semantic search models and
generative methods in the current year.
      </p>
      <p>Furthermore, we observed that our submissions using generated search queries outperformed
those utilizing traditional search queries. Specifically, the distilbert-base-tas-b model, fine-tuned
via GPL on a vast collection of scientific documents and employed to re-rank the top 500
documents retrieved by an Elastic Search system, demonstrated superior performance when
combined with query-level generated search queries.</p>
      <p>Furthermore, we employed various prompt-engineering techniques for the SimpleText
simplification task [ 6], resulting in the highest-ranking performances on the sentence-level
simplification task. While the success of our submission can be largely attributed to the inherent
capabilities of the GPT-3.5 model, it is important to explore what methods can be used to
best exploit GPT-3.5 for text simplification tasks nonetheless. Our findings indicate that the
simplest prompts, wherein we requested sentence simplification without additional instructions
or examples, yielded the best FKGL and BLEU performances. Conversely, runs generated with
few-shot prompts did not perform as well, particularly on FKGL. This can be attributed to the
complexity of sentences in the provided test set, compared to the significantly simpler sentences
in the reference set of the oficial evaluation, which had a lower FKGL. Consequently, using the
provided set as few-shot examples led to the generation of more complex sentences.
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    </sec>
    <sec id="sec-7">
      <title>A. Task 3 Prompts</title>
      <p>### REQUEST ###
- Sentence:
{row.source_snt}
- Simplified Sentence:
### TASK ###
Simplify the language used in this sentence from a scientific article so that it can be understood by the general audience.
Focus on simplifying the sentence structure and replacing scientific jargon with everyday language.
### TASK ####
You are going to simplify a given abstract intended for an academic audience to a text that is understandable to the
general audience.
### REQUEST ###
Remember: the goal is not to oversimplify or distort the scientific abstract, but to make it accessible and understandable
to more people.
- Abstract:
{row.abs_source}
- Simplified abstract:</p>
      <p>Your task is to simplify a given sentence.
### TASK ###
Simplify a given sentence extracted from a scientific article to a sentence that is understandable to the general
audience.
### REQUEST ###
Remember, the goal is to retain the original meaning of the sentence while making it easier for a general audience to
understand.
{
### EXAMPLES ###
## EXAMPLE 1 ##
- Source Abstract:
{ex1.abs_source}
- Original Sentence:
{ex1.source_snt}
- Complex Terms:
{ex1.complex_terms}
- Simplified Sentence:
{ex1.simplified_snt}
## EXAMPLE 2 ##
- Source Abstract:
{ex2.abs_source}
### TASK ###
Identify complex and technical terms from a given scientific abstract that require simplification or explanation in order
to be understood by a general audience.</p>
      <p>Provide the complex terms along with their simpler synonym or definition in list format.
Complex Terms:
### TASK ###
Simplify a given sentence extracted from a scientific article to a sentence that is understandable to the general audience.
- Complex Terms:
{ex2.complex_terms}
### EXAMPLES ###
## EXAMPLE 1 ##
- Source Abstract:
{ex1.abs_source}
- Original Sentence:
{ex1.source_snt}
- Simplified Sentence:
{ex1.simplified_snt}
## EXAMPLE 2 ##
- Source Abstract:
{ex2.abs_source}
## EXAMPLE 3 ##
- Source Abstract:
{ex3.abs_source}
### REQUEST ###
Remember, the goal is to retain the original meaning of the sentence while making it easier for a general audience to
understand. Focus on replacing scientific jargon with everyday language and explaining complex, essential terms.
- Simplified sentence:
### TASK ###
Simplify a given sentence extracted from a scientific article to a sentence that is understandable to the general audience.
{
## EXAMPLE 4 ##
- Source Abstract:
{ex4.abs_source}
- Original Sentence:
{ex4.source_snt}
- Simplified Sentence:
{ex4.simplified_snt}
## EXAMPLE 5 ##
- Source Abstract:
{ex5.abs_source}
- Original Sentence:
{ex5.source_snt}
- Simplified Sentence:
{ex5.simplified_snt}}
### INSTRUCTIONS ###
1. **Identify Technical Terms:** Look for scientific or technical terms that may not be commonly understood by a general
audience. Replace these with simpler, more universally understood terms. For example, "co-ingestion" was simplified to
"consumption"; "nonsteroidal anti-inflammatory drug (NSAID)" was simplified to "nonsteroidal anti-inflammatory drugs".
2. **Simplify Complex Phrases:** Replace complex phrases with simpler ones. For example, "carried on experiments" was
simplified to "conducted experiments".
3. **Eliminate Unnecessary Details:** Remove any details or information that is not essential to the main point of the
sentence. For example, "based on user and tweets characteristics" was removed as it was not essential to understand the
main point.
4. **Clarify Statistics and Measurements:** If a sentence includes statistical data or measurements, explain it in a way
that makes it easier to understand. For example, "(0.23 vs 0.45 [F = 4.24, p u003c 0.05])" was simplified to "(0.23 vs
0.45, with statistical significance)".
5. **Make the Subject Clearer:** Make sure the subject of the sentence is clear. For example, "intervention participants"
was clarified to "those who received the CDSS suite".
6. **Use Active Voice:** Try to use active voice instead of passive voice as it is easier to understand.
7. **Break Down Long Sentences:** If the sentence is too long, try to break it down into smaller sentences.
8. **Use Everyday Language:** Instead of scientific jargon, use everyday language whenever possible.
9. **Use context:** Simplify the given sentence, but use the provided 'Source Abstract' if additional context is needed.
### REQUEST ###
Remember, the goal is to retain the original meaning of the sentence while making it easier for a general audience to
understand.
- Source Abstract:
{row.abs_source}
- Original Sentence:
{row.source_snt}
- Simplified sentence:
### INSTRUCTIONS ###
1. **Identify Technical Terms:** Look for scientific or technical terms that may not be commonly understood by a general
audience. Replace these with simpler, more universally understood terms. For example, "co-ingestion" was simplified to
"consumption"; "nonsteroidal anti-inflammatory drug (NSAID)" was simplified to "nonsteroidal anti-inflammatory drugs".
2. **Simplify Complex Phrases:** Replace complex phrases with simpler ones. For example, "carried on experiments" was
simplified to "conducted experiments".
3. **Eliminate Unnecessary Details:** Remove any details or information that is not essential to the main point of the
sentence. For example, "based on user and tweets characteristics" was removed as it was not essential to understand the
main point.
4. **Clarify Statistics and Measurements:** If a sentence includes statistical data or measurements, explain it in a way
that makes it easier to understand. For example, "(0.23 vs 0.45 [F = 4.24, p u003c 0.05])" was simplified to "(0.23 vs 0.45,
with statistical significance)".
5. **Make the Subject Clearer:** Make sure the subject of the sentence is clear. For example, "intervention participants"
was clarified to "those who received the CDSS suite".
6. **Use Active Voice:** Try to use active voice instead of passive voice as it is easier to understand.
7. **Break Down Long Sentences:** If the sentence is too long, try to break it down into smaller sentences.
8. **Use Everyday Language:** Instead of scientific jargon, use everyday language whenever possible.
9. **Use context:** Simplify the given sentence, but use the provided 'Source Abstract' if additional context is needed.
{
### EXAMPLES ###
## EXAMPLE 1 ##
- Source Abstract:
{ex1.abs_source}
- Original Sentence:
{ex1.source_snt}
- Simplified Sentence:
{ex1.simplified_snt}
## EXAMPLE 2 ##
- Source Abstract:
{ex2.abs_source}
- Original Sentence:
{ex2.source_snt}
- Simplified Sentence:
{ex2.simplified_snt}
## EXAMPLE 3 ##
- Source Abstract:
{ex3.abs_source}
- Original Sentence:
{ex3.source_snt}
- Simplified Sentence:
{ex3.simplified_snt}
}
### REQUEST ###
Remember, the goal is to retain the original meaning of the sentence while making it easier for a general audience to
understand.
- Source Abstract:
{row.abs_source}
- Original Sentence:
{row.source_snt}
- Simplified sentence:
### INSTRUCTIONS ###
1. **Identify Technical Terms:** Look for scientific or technical terms that may not be commonly understood by a general
audience. Replace these with simpler, more universally understood terms. For example, "co-ingestion" was simplified to
"consumption"; "nonsteroidal anti-inflammatory drug (NSAID)" was simplified to "nonsteroidal anti-inflammatory drugs".
2. **Simplify Complex Phrases:** Replace complex phrases with simpler ones. For example, "carried on experiments" was
simplified to "conducted experiments".
3. **Eliminate Unnecessary Details:** Remove any details or information that is not essential to the main point of the
sentence. For example, "based on user and tweets characteristics" was removed as it was not essential to understand the
main point.
4. **Clarify Statistics and Measurements:** If a sentence includes statistical data or measurements, explain it in a way
that makes it easier to understand. For example, "(0.23 vs 0.45 [F = 4.24, p u003c 0.05])" was simplified to "(0.23 vs
0.45, with statistical significance)".
5. **Make the Subject Clearer:** Make sure the subject of the sentence is clear. For example, "intervention participants"
was clarified to "those who received the CDSS suite".
6. **Use Active Voice:** Try to use active voice instead of passive voice as it is easier to understand.
7. **Break Down Long Sentences:** If the sentence is too long, try to break it down into smaller sentences.
8. **Use Everyday Language:** Instead of scientific jargon, use everyday language whenever possible.</p>
    </sec>
  </body>
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