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  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Memotion 2: Dataset on Sentiment and Emotion Analysis of Memes</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Sathyanarayanan Ramamoorthy</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Nethra Gunti</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Shreyash Mishra</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>S Suryavardan</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Aishwarya Reganti</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Parth Patwa</string-name>
          <xref ref-type="aff" rid="aff3">3</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Amitava Das</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff4">4</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Tanmoy Chakraborty</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Amit Sheth</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Asif Ekbal</string-name>
          <xref ref-type="aff" rid="aff2">2</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Chaitanya Ahuja</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>IIIT Sri City</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>India</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Amazon</string-name>
        </contrib>
        <contrib contrib-type="editor">
          <string-name>Vancouver, Canada</string-name>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>AI Institute, University of South Carolina</institution>
          ,
          <country country="US">USA</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>IIIT Delhi</institution>
          ,
          <country country="IN">India</country>
        </aff>
        <aff id="aff2">
          <label>2</label>
          <institution>IIT Patna</institution>
          ,
          <country country="IN">India</country>
        </aff>
        <aff id="aff3">
          <label>3</label>
          <institution>University of California Los Angeles</institution>
          ,
          <country country="US">USA</country>
        </aff>
        <aff id="aff4">
          <label>4</label>
          <institution>Wipro AI labs</institution>
          ,
          <country country="IN">India</country>
        </aff>
      </contrib-group>
      <abstract>
        <p>Memes are commonly used in social media platforms for humour. Generally, memes consist of an image and embedded text. Memes can be used to spread hate or misinformation, hence it is important to study them. The Memotion task [1] conducted at SemEval 2020, released a data of 10k memes annotated with sentiment label (task A), emotion label (task B) and emotion intensity label (task C). It received ≈ 30 run submissions and 27 papers. However, the best f1 scores were only 0.35, 0.51 and 0.32 respectively for task A, task B, and task C, which shows the need for more extensive research on this topic. In this paper, we release a new dataset, Memotion 2 which has 10k annotated memes along the same directions as Memotion 1.0 This paper detailed baseline system on the Memotion 2.0 data.</p>
      </abstract>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Introduction</title>
      <p>
        Memes, usually created with image and/or text, have become a highly popular medium of
communication on the internet. Over the past decade, memes have become an integral part of
the internet culture, giving communities the power to make their voices heard to large audiences
in a matter of few hours. Hence, to understand a community’s opinions and alignment with
their causes, a good start would is to be conscious of the memes shared by the community [
        <xref ref-type="bibr" rid="ref2">2</xref>
        ] .
      </p>
      <p>Fig 1 shows the rapid growth in using memes over the past few years and its success can
be attributed to the increased usage of internet by people from all walks of life. Many memes
are used for just fun and games, but they are also a powerful medium to voice a community’s
opinion (or alignment with a cause). With the freedom to express opinion anonymously comes
a varying definition of ”normal”. As dificult as it already is to classify content from unimodal
data like simple texts/tweets; including multi-modal data (eg. memes) into the mix only further
complicates the problem, given the fact that they are highly unconventional and don’t have a
ifxed template or modality.</p>
      <p>
        A flip side of this powerful medium is that it can be misused to spread hatred in the community.
The growing trends in hate speech on social media commensurate with the increased quotidian
usage of memes. Considering the efects hate speech might have on individuals, detecting and
preventing such content from being spread is important. Williams et al. 2016 [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ] is one such
work that studies the efect of racist memes on real life and vice versa. It only strengthens
the need to thoroughly analyse memes. Detecting hate speech in online platforms has gained
traction over the past few years in the research community. Building a system that can work
on memes is highly complex because of the nature of multi-modal data in them, the worst-case
scenario being that the modalities involved can be complementary and still convey meaning.
      </p>
      <p>Humans show various emotions like rage, disgust, grief, serenity, fear, etc. and each exhibits
them in varying levels of intensity. Our dataset, Memotion 2.0, focuses on quantifying emotion
and their intensities into discrete labels. It also has labels corresponding to the sentiment of a
meme. Memotion 2.0 adds to the previous iteration (Memotion 1.0) by providing another set of
10k memes from various social media websites. In this iteration, the collected memes are more
widespread in terms of topics ranging from history to world wars, politics, etc. Popular social
media sites like Reddit, Facebook, Imgur, Instagram were used as sources for memes. These
websites consist of individuals from diferent countries, religions and ethnic groups. Hence, we
believe that this enables the analysis of multi-modal memes with respect to sentiment analysis
and emotion detection using our dataset more closer to general human perception.</p>
      <p>The paper is organised as follows: We describe the related work and the task in section 2 and
3 respectively; Section 4 contains the details of the dataset we collected for memotion analysis:
Memotion 2.0 ; followed by a brief description of baseline models 5 and their results in 6. We
conclude with the mention of future work and limitations, in section 7.</p>
    </sec>
    <sec id="sec-2">
      <title>2. Related Work</title>
      <p>
        Past years have seen a lot of work related to analysing social media content and detecting
emotions, profanity and other such attributes. Majority of hate speech datasets are of textual
modality [
        <xref ref-type="bibr" rid="ref5 ref6">5, 6</xref>
        ] and several of them are from twitter [
        <xref ref-type="bibr" rid="ref7 ref8 ref9">7, 8, 9</xref>
        ].
      </p>
      <p>
        Due to their reliance on identifying n-grams, phrases or textual patterns, these datasets do
not account for subjective bias [
        <xref ref-type="bibr" rid="ref10">10</xref>
        ] and may present a lack of context [
        <xref ref-type="bibr" rid="ref11 ref12">11, 12</xref>
        ] when classifying
uni-modal data. The same goes for text based sentiment analysis and emotion analysis datasets
such as [
        <xref ref-type="bibr" rid="ref13 ref14 ref15">13, 14, 15</xref>
        ].
      </p>
      <p>The growing ubiquity of Internet memes on social media platforms suggests that it is more
than important to consider such multi-modal content. MMHS150K [16] is a dataset collected
from Twitter using Hatebase terms. It contains 150,000 tweets and images manually annotated
into six classes based on the type of hate speech. Haoti et. al. [17] and Hosseinmardi et. al.
[18] provide annotated datasets from Instagram with posts and comments targeted towards
combating cyberbullying. Sentiment analysis datasets such as [19] and [20] classify videos or
image-text pairs into ”positive” or ”negative” labels.</p>
      <p>
        While there are several datasets that facilitate computation of social media data, analysing
memes has received relatively less attention. MultiOFF [21] is an annotated dataset with 743
memes from Kaggle. While it does have image and text captions, the dataset only has binary
labels i.e. ”ofensive” and ”non-ofensive”. Another notable dataset is hateful memes dataset by
facebook [22]. The memes are from social media groups in the United States and they were
annotated using a specific definition of hate speech. Each meme can have multiple labels and
the labels are defined for multimodal and unimodal hate speech separately. The dataset is of
size 10k but has some reconstructed i.e. artificial memes. The Memotion 1.0 task at SemEval
2020 [
        <xref ref-type="bibr" rid="ref1">1</xref>
        ] succeeded at drawing attention to the analysis and detection of sentiment and hate
speech in memes. The participants were provided with around 10K memes with multiple
human annotated labels for 3 tasks - sentiment analysis, emotion analysis, emotion intensity
classification. The task achieved a highest F1 score of 0.35, 0.51 and 0.32 for the three tasks
respectively.
      </p>
    </sec>
    <sec id="sec-3">
      <title>3. Memotion 2.0 task</title>
      <p>
        We release a dataset of 10k annotated memes. Each data point consists of of an image and
text associated with it along with labels for each sub-tasks. Similar to Memotion 1 [
        <xref ref-type="bibr" rid="ref1">1</xref>
        ], We
consider sentiment, emotions and their intensities and hence they form our sub tasks, which
are as follows:
• Task A: Sentiment Analysis - Given an Internet meme, the first task is to classify it as
a positive, negative or neutral meme. This helps one to understand the sentiment of a
meme. Figure 3 explains why a particular meme might have a negative sentiment.
• Task B: Emotion Classification - Given an Internet meme, the system has to identify
      </p>
      <p>the type of emotion expressed. The categories should indicate if the meme is humorous,
sarcastic, ofensive and motivational. A meme can belong to more than one category.
• Task C: Scales/Intensity of Emotion Classes - The third task is to quantify the extent
to which a particular emotion is being expressed. Fig 2 mentions about intensities of each
emotion.</p>
      <p>Tasks B and C can be clearly understood by looking at the meme in Figure 4.</p>
    </sec>
    <sec id="sec-4">
      <title>4. Dataset</title>
      <p>In this section we describe the data collections and data annotation process along with a brief
summary of the data distribution.</p>
      <sec id="sec-4-1">
        <title>4.1. Data Collection</title>
        <p>As established in prior sections, memes are highly complex form of data, and it is necessary
that we collect them from a wide range of categories. We shortlisted several topics of interests:
like politics, religion, sports etc.- and manually downloaded the memes. We have also used a
Selenium based web-crawler for a part of data collection, followed by extensive cleaning of the
data. All the memes have been collected from public domains, and in order to avoid copyright
claims, the source-urls have been attributed in the dataset. We used the Google Vision API1 to
extract the OCR text from the images.</p>
      </sec>
      <sec id="sec-4-2">
        <title>4.2. Data Annotation</title>
        <p>After collecting data, we turned to Amazon Mechanical Turk(AMT) 2 workers to get it annotated.
An annotator has to choose from the following and annotate each meme for all the said
ifelds. For this purpose, they use an interface built by us, as shown in Fig 2. For task A,
the annotators were asked to judge what the person who created the meme intended it to be
(positive/negative/neutral). For task B and C, the annotators were asked to mark their opinions
on the emotion of the meme. The true afect of a meme on an individual depends on their
perception of several aspects within the society, and could vary a lot from another individual.
We solve this problem with each meme being annotated by 3 diferent workers. Based on the
majority voting scheme, the final annotations are adjudicated.</p>
      </sec>
      <sec id="sec-4-3">
        <title>4.3. Data Distribution</title>
        <p>The dataset consists of 10,000 images divided into a train-val-test split with 8500-1500-1500
images. Each meme is annotated for its Overall Sentiment (positive, neutral, negative), Emotion
(humour, sarcasm, ofense, motivation) and Scale of Emotion (0-4 levels). Along with the said
attributes, we also introduce a new attribute called ”classification_based_on”, which denotes if
the annotation has been made on the basis of image only, text only, or both image and text data.
Fig.5. shows the distribution of memes across all the 20 labels.</p>
        <p>The statistical summaries in Fig. 6 and Fig.7 show the overlapping emotions in memes, which
proves the aforementioned challenges. Several interesting points can be inferred from the tables
like many ofensive memes are funny. It can also be observed that many of the memes are funny
and non-motivational.</p>
      </sec>
    </sec>
    <sec id="sec-5">
      <title>5. Baseline Model</title>
      <p>In this section, we describe the various baseline models that we tried.</p>
      <sec id="sec-5-1">
        <title>5.1. Text Model</title>
        <p>Memes are known to convey information with both image and text. However, it is noticed that
many memes have the same template (image) but diferent text and by implication, diferent
messages to convey. Recognizing of the emotion induced in such memes would require accurate
modelling of the textual influence. For this purpose, we evaluate the afect of textual features
using LSTM. The additional controlling knobs in LSTM, makes it more suitable than simple
RNNs for these classification tasks. Table 1. shows the baseline Weighted F1 scores of the model
on all three memotion tasks.</p>
      </sec>
      <sec id="sec-5-2">
        <title>5.2. Vision + Text Model</title>
        <p>Experiments are carried out considering the multi-modal features of memes i.e both image and
OCR text. BERT is a widely known attention model that provides State-Of-The-Art results on
various text related tasks. We make use of BERT to extract features from the OCR text. The
text and image features are represented by the CLS output of BERT and the final MLP layer
output of ResNet-50 respectively. We concatenate the obtained features and use two layers of
MLP for classification. Scores on Tasks A, B and C are reported in table 1.</p>
      </sec>
    </sec>
    <sec id="sec-6">
      <title>6. Results</title>
      <p>Baseline results in Table 1 show Weighted F1 scores for each task and sub-task. It can inferred
from the table that multi-modal Image+Text models with scores 43.90%, 73.72% and 51.08%,
perform better than the Text-Only models with scores 28.29%, 31.38%, 50.94% for Task A, Task
B, and Task C, respectively. The table shows the inconsistency of performance throughout Task
B and Task C sub-tasks upon using Text-Only model, unlike Image+Text model. Although it
can’t be concluded, one can clearly see the importance of using multi-modal data for the said
tasks. This dataset will be publicly available and we leave it to the future works, to come up
with novel methods which dig deeper into Memotion Analysis and provide statistical insights
to multi-modal relations of a Meme.</p>
      <p>Task
Task-A
Task-B
Task-C</p>
      <p>Class
Sentiment
Humour
Sarcasm
Ofensive
Motivation
Average
Humour
Sarcasm
Ofensive
Motivation
Average</p>
    </sec>
    <sec id="sec-7">
      <title>7. Conclusion</title>
      <p>In this paper, we introduce a novel task of identifying memes and classifying them using a
multimodal setting. To the best of our knowledge, this is the first large-scale multimodal dataset
for meme classification. In order to provide a fine-grained and extensive analysis of tweets We
provide gold-data for three diferent verticals namely- sentiment analysis, emotion classification
and intensity of emotion. We also provide text only and multimodal baselines for each of these
tasks. While the text-only model uses LSTM, the multi-modal model uses ResNet-50 + BERT,
which is a recent SOTA model on many popular image-text tasks like captioning, VQA, phrase
grounding etc. The performance of these models indicate that incorporating both images and
text for all the tasks improves performance, however, it must be noted that our models are only
preliminary and more innovative methods will improve performance furthermore. In the future,
we intend to extend our work by releasing datasets for memes of other languages, identification
of targets of hate and difusion patterns etc.
[16] R. Gomez, J. Gibert, L. Gomez, D. Karatzas, Exploring hate speech detection in multimodal
publications, 2019. arXiv:1910.03814.
[17] H. Zhong, H. Li, A. Squicciarini, S. Rajtmajer, C. Grifin, D. Miller, C. Caragea,
Contentdriven detection of cyberbullying on the instagram social network, 2016.
[18] H. Hosseinmardi, S. A. Mattson, R. I. Rafiq, R. Han, Q. Lv, S. Mishra, Detection of
cyberbullying incidents on the instagram social network, 2015. arXiv:1503.03909.
[19] L.-P. Morency, R. Mihalcea, P. Doshi, Towards Multimodal Sentiment Analysis:
Harvesting Opinions from The Web, in: International Conference on Multimodal Interfaces
(ICMI 2011), Alicante, Spain, 2011. URL: http://ict.usc.edu/pubs/Towards%20Multimodal%
20Sentiment%20Analysis-%20Harvesting%20Opinions%20from%20The%20Web.pdf.
[20] A. Hu, S. Flaxman, Multimodal sentiment analysis to explore the structure of
emotions, Proceedings of the 24th ACM SIGKDD International Conference on
Knowledge Discovery |&amp; Data Mining (2018). URL: http://dx.doi.org/10.1145/3219819.3219853.
doi:10.1145/3219819.3219853.
[21] S. Suryawanshi, B. R. Chakravarthi, M. Arcan, P. Buitelaar, Multimodal meme dataset
(MultiOFF) for identifying ofensive content in image and text, in: Proceedings of the
Second Workshop on Trolling, Aggression and Cyberbullying, European Language Resources
Association (ELRA), Marseille, France, 2020, pp. 32–41. URL: https://aclanthology.org/2020.
trac-1.6.
[22] D. Kiela, H. Firooz, A. Mohan, V. Goswami, A. Singh, P. Ringshia, D. Testuggine, The hateful
memes challenge: Detecting hate speech in multimodal memes, 2021. arXiv:2005.04790.</p>
    </sec>
  </body>
  <back>
    <ref-list>
      <ref id="ref1">
        <mixed-citation>
          [1]
          <string-name>
            <given-names>C.</given-names>
            <surname>Sharma</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            <surname>Bhageria</surname>
          </string-name>
          ,
          <string-name>
            <given-names>W.</given-names>
            <surname>Paka</surname>
          </string-name>
          , Scott, S.
          <string-name>
            <surname>P Y K L</surname>
            , A. Das,
            <given-names>T.</given-names>
          </string-name>
          <string-name>
            <surname>Chakraborty</surname>
            ,
            <given-names>V.</given-names>
          </string-name>
          <string-name>
            <surname>Pulabaigari</surname>
            ,
            <given-names>B.</given-names>
          </string-name>
          <string-name>
            <surname>Gambäck</surname>
            , SemEval-2020 Task 8:
            <given-names>Memotion</given-names>
          </string-name>
          <string-name>
            <surname>Analysis-The Visuo-Lingual Metaphor</surname>
          </string-name>
          !,
          <source>in: Proceedings of the 14th International Workshop on Semantic Evaluation (SemEval-2020)</source>
          ,
          <article-title>Association for Computational Linguistics</article-title>
          , Barcelona, Spain,
          <year>2020</year>
          .
        </mixed-citation>
      </ref>
      <ref id="ref2">
        <mixed-citation>
          [2]
          <string-name>
            <given-names>N.</given-names>
            <surname>Gal</surname>
          </string-name>
          ,
          <string-name>
            <given-names>L.</given-names>
            <surname>Shifman</surname>
          </string-name>
          ,
          <string-name>
            <given-names>Z.</given-names>
            <surname>Kampf</surname>
          </string-name>
          , “it gets better”:
          <article-title>Internet memes and the construction of collective identity</article-title>
          ,
          <source>New Media &amp; Society</source>
          <volume>18</volume>
          (
          <year>2016</year>
          )
          <fpage>1698</fpage>
          -
          <lpage>1714</lpage>
          . URL: https://doi.org/10.1177/1461444814568784. doi:
          <volume>10</volume>
          .1177/1461444814568784. arXiv:https://doi.org/10.1177/1461444814568784.
        </mixed-citation>
      </ref>
      <ref id="ref3">
        <mixed-citation>
          [3]
          <string-name>
            <surname>Google</surname>
          </string-name>
          , Google search interest in ”memes”,
          <year>2022</year>
          . URL: https://trends.google.com/trends/ explore?date
          <article-title>=all&amp;q=memes.</article-title>
        </mixed-citation>
      </ref>
      <ref id="ref4">
        <mixed-citation>
          [4]
          <string-name>
            <given-names>A.</given-names>
            <surname>Williams</surname>
          </string-name>
          ,
          <string-name>
            <given-names>C.</given-names>
            <surname>Oliver</surname>
          </string-name>
          ,
          <string-name>
            <given-names>K.</given-names>
            <surname>Aumer</surname>
          </string-name>
          ,
          <string-name>
            <given-names>C.</given-names>
            <surname>Meyers</surname>
          </string-name>
          ,
          <article-title>Racial microaggressions and perceptions of internet memes</article-title>
          ,
          <source>Computers in Human Behavior</source>
          <volume>63</volume>
          (
          <year>2016</year>
          )
          <fpage>424</fpage>
          -
          <lpage>432</lpage>
          . doi:
          <volume>10</volume>
          .1016/j.chb.
          <year>2016</year>
          .
          <volume>05</volume>
          .067.
        </mixed-citation>
      </ref>
      <ref id="ref5">
        <mixed-citation>
          [5]
          <string-name>
            <given-names>J.</given-names>
            <surname>Struß</surname>
          </string-name>
          ,
          <string-name>
            <given-names>M.</given-names>
            <surname>Siegel</surname>
          </string-name>
          ,
          <string-name>
            <given-names>J.</given-names>
            <surname>Ruppenhofer</surname>
          </string-name>
          ,
          <string-name>
            <given-names>M.</given-names>
            <surname>Wiegand</surname>
          </string-name>
          ,
          <string-name>
            <surname>M.</surname>
          </string-name>
          <article-title>Klenner, Overview of germeval task 2, 2019 shared task on the identification of ofensive language</article-title>
          ,
          <year>2019</year>
          .
        </mixed-citation>
      </ref>
      <ref id="ref6">
        <mixed-citation>
          [6]
          <string-name>
            <given-names>J.</given-names>
            <surname>Qian</surname>
          </string-name>
          ,
          <string-name>
            <given-names>A.</given-names>
            <surname>Bethke</surname>
          </string-name>
          ,
          <string-name>
            <given-names>Y.</given-names>
            <surname>Liu</surname>
          </string-name>
          ,
          <string-name>
            <given-names>E.</given-names>
            <surname>Belding</surname>
          </string-name>
          ,
          <string-name>
            <given-names>W. Y.</given-names>
            <surname>Wang</surname>
          </string-name>
          ,
          <article-title>A benchmark dataset for learning to intervene in online hate speech</article-title>
          ,
          <year>2019</year>
          . arXiv:
          <year>1909</year>
          .04251.
        </mixed-citation>
      </ref>
      <ref id="ref7">
        <mixed-citation>
          [7]
          <string-name>
            <given-names>Z.</given-names>
            <surname>Waseem</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            <surname>Hovy</surname>
          </string-name>
          ,
          <article-title>Hateful symbols or hateful people? predictive features for hate speech detection on twitter</article-title>
          ,
          <year>2016</year>
          , pp.
          <fpage>88</fpage>
          -
          <lpage>93</lpage>
          . doi:
          <volume>10</volume>
          .18653/v1/
          <fpage>N16</fpage>
          -2013.
        </mixed-citation>
      </ref>
      <ref id="ref8">
        <mixed-citation>
          [8]
          <string-name>
            <given-names>Z.</given-names>
            <surname>Waseem</surname>
          </string-name>
          ,
          <article-title>Are you a racist or am i seeing things? annotator influence on hate speech detection on twitter</article-title>
          ,
          <source>in: NLP+CSS@EMNLP</source>
          ,
          <year>2016</year>
          .
        </mixed-citation>
      </ref>
      <ref id="ref9">
        <mixed-citation>
          [9]
          <string-name>
            <given-names>P.</given-names>
            <surname>Burnap</surname>
          </string-name>
          ,
          <string-name>
            <given-names>M.</given-names>
            <surname>Williams</surname>
          </string-name>
          ,
          <article-title>Us and them: identifying cyber hate on twitter across multiple protected characteristics</article-title>
          ,
          <source>EPJ Data Science</source>
          <volume>5</volume>
          (
          <year>2016</year>
          ). doi:
          <volume>10</volume>
          .1140/epjds/ s13688-016-0072-6.
        </mixed-citation>
      </ref>
      <ref id="ref10">
        <mixed-citation>
          [10]
          <string-name>
            <given-names>T.</given-names>
            <surname>Davidson</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            <surname>Warmsley</surname>
          </string-name>
          ,
          <string-name>
            <given-names>M.</given-names>
            <surname>Macy</surname>
          </string-name>
          ,
          <string-name>
            <surname>I. Weber</surname>
          </string-name>
          ,
          <source>Automated hate speech detection and the problem of ofensive language</source>
          ,
          <year>2017</year>
          . arXiv:
          <volume>1703</volume>
          .
          <fpage>04009</fpage>
          .
        </mixed-citation>
      </ref>
      <ref id="ref11">
        <mixed-citation>
          [11]
          <string-name>
            <given-names>T.</given-names>
            <surname>Davidson</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            <surname>Bhattacharya</surname>
          </string-name>
          ,
          <string-name>
            <surname>I. Weber</surname>
          </string-name>
          ,
          <article-title>Racial bias in hate speech and abusive language detection datasets</article-title>
          ,
          <year>2019</year>
          . arXiv:
          <year>1905</year>
          .12516.
        </mixed-citation>
      </ref>
      <ref id="ref12">
        <mixed-citation>
          [12]
          <string-name>
            <given-names>M.</given-names>
            <surname>Sap</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            <surname>Card</surname>
          </string-name>
          , S. Gabriel, C. Yejin,
          <string-name>
            <surname>N. Smith,</surname>
          </string-name>
          <article-title>The risk of racial bias in hate speech detection</article-title>
          ,
          <year>2019</year>
          , pp.
          <fpage>1668</fpage>
          -
          <lpage>1678</lpage>
          . doi:
          <volume>10</volume>
          .18653/v1/
          <fpage>P19</fpage>
          -1163.
        </mixed-citation>
      </ref>
      <ref id="ref13">
        <mixed-citation>
          [13]
          <string-name>
            <given-names>A. L.</given-names>
            <surname>Maas</surname>
          </string-name>
          ,
          <string-name>
            <given-names>R. E.</given-names>
            <surname>Daly</surname>
          </string-name>
          ,
          <string-name>
            <given-names>P. T.</given-names>
            <surname>Pham</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            <surname>Huang</surname>
          </string-name>
          ,
          <string-name>
            <given-names>A. Y.</given-names>
            <surname>Ng</surname>
          </string-name>
          ,
          <string-name>
            <given-names>C.</given-names>
            <surname>Potts</surname>
          </string-name>
          ,
          <article-title>Learning word vectors for sentiment analysis, in: Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies, Association for Computational Linguistics</article-title>
          , Portland, Oregon, USA,
          <year>2011</year>
          , pp.
          <fpage>142</fpage>
          -
          <lpage>150</lpage>
          . URL: http://www.aclweb.org/anthology/P11-1015.
        </mixed-citation>
      </ref>
      <ref id="ref14">
        <mixed-citation>
          [14]
          <string-name>
            <given-names>A.</given-names>
            <surname>Go</surname>
          </string-name>
          ,
          <string-name>
            <given-names>R.</given-names>
            <surname>Bhayani</surname>
          </string-name>
          ,
          <string-name>
            <given-names>L.</given-names>
            <surname>Huang</surname>
          </string-name>
          ,
          <article-title>Twitter sentiment classification using distant supervision</article-title>
          ,
          <source>Processing</source>
          <volume>150</volume>
          (
          <year>2009</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref15">
        <mixed-citation>
          [15]
          <string-name>
            <given-names>P.</given-names>
            <surname>Patwa</surname>
          </string-name>
          , G. Aguilar,
          <string-name>
            <given-names>S.</given-names>
            <surname>Kar</surname>
          </string-name>
          ,
          <string-name>
            <given-names>S.</given-names>
            <surname>Pandey</surname>
          </string-name>
          ,
          <string-name>
            <surname>S. PYKL</surname>
          </string-name>
          ,
          <string-name>
            <given-names>B.</given-names>
            <surname>Gambäck</surname>
          </string-name>
          ,
          <string-name>
            <given-names>T.</given-names>
            <surname>Chakraborty</surname>
          </string-name>
          ,
          <string-name>
            <given-names>T.</given-names>
            <surname>Solorio</surname>
          </string-name>
          ,
          <string-name>
            <surname>A. Das</surname>
          </string-name>
          , SemEval
          <article-title>-2020 task 9: Overview of sentiment analysis of code-mixed tweets</article-title>
          ,
          <source>in: Proceedings of the Fourteenth Workshop on Semantic Evaluation</source>
          , International Committee for Computational Linguistics,
          <source>Barcelona (online)</source>
          ,
          <year>2020</year>
          . URL: https://aclanthology.org/
          <year>2020</year>
          .semeval-
          <volume>1</volume>
          .
          <fpage>100</fpage>
          .
        </mixed-citation>
      </ref>
    </ref-list>
  </back>
</article>