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<pre>
                                    CLEOPATRA 2021

2nd International Workshop on Cross-lingual Event-centric Open Analytics

                                            Preface


This volume of proceedings gathers papers from the 2nd International Workshop on
Cross-lingual Event-centric Open Analytics (CLEOPATRA 2021), co-located with The Web
Conference (WWW 2021) held on the 12th of April, 2021.

Modern society faces an unprecedented number of events that impact countries, communities
and economies around the globe, across language, country and community borders. Recent
examples include sudden or unexpected events such as terrorist attacks and political shake-ups
such as Brexit, events related to the ongoing COVID-19 pandemic, as well as longer ongoing
and evolving topics such as the migration crisis in Europe that regularly spawn events of global
importance affecting local communities. These developments result in a vast amount of
event-centric, multilingual information available from heterogeneous sources on the Web, in the
Web of Data, within Knowledge Graphs, in social media, inside Web archives and in news
sources. Such event-centric information differs across sources, languages and communities,
potentially reflecting community-specific aspects, opinions, sentiments and bias.

The theme of the workshop includes a variety of interdisciplinary challenges related to analysis,
interaction with and interpretation of vast amounts of event-centric textual, semantic and visual
information in multiple languages originating from different communities. The goal of the
interdisciplinary CLEOPATRA workshop is to bring together researchers and practitioners from
the fields of Semantic Web, the Web, NLP, IR, Human Computation, Visual Analytics and Digital
Humanities to discuss and evaluate methods and solutions for effective and efficient analytics of
event-centric multilingual information spread across heterogeneous sources. This will support
the delivery of analytical results in ways that are meaningful to users, helping them to cross
language barriers and better understand event representations, and their context, in other
languages.

This year we have accepted five long and two short papers. The contributions of the papers
accepted at CLEOPATRA 2021 include approaches about cross-lingual models for document
similarity, sentiment analysis, named entity recognition, multimodal claim detection in social
media, creation of an open event knowledge graph, and detection of barriers in news spreading.

We would like to take this opportunity to sincerely thank the authors for their invaluable and
inspiring contributions to the workshops. Our sincere thanks are due to the program committee
members for reviewing the submissions and ensuring the high quality of our workshop program.
We are also very grateful to the organisers of The Web Conference 2021 conference, and in
particular to the Workshops and Tutorials Chairs, Julian McAuley and Karthik Subbian, for their
support with the workshop organisation. We also thank Roberto Navigli for his keynote talk in
the workshop.

                                                                              Elena Demidova
                                                                             Sherzod Hakimov
                                                                                 Jane Winters
                                                                                  Marko Tadić

April 2021

Acknowledgement. The CLEOPATRA 2021 workshop was co-organised by members of
Cleopatra - a Marie Skłodowska-Curie Innovative Training Network. Cleopatra - Cross-lingual
Event-centric Open Analytics Research Academy received funding from the European Union’s
Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant
agreement no. 812997. http://cleopatra-project.eu/

                                       Organisation
Organising Committee:

Elena Demidova, Data Science & Intelligent Systems (DSIS), University of Bonn, Germany
Sherzod Hakimov, TIB, Leibniz Information Centre for Science and Technology, Germany
Jane Winters, School of Advanced Study, University of London, UK
Marko Tadić, University of Zagreb, Faculty of Humanities and Social Sciences, Croatia

Programme Committee:

Ralph Ewerth, TIB, Leibniz Information Centre for Science and Technology
Marko Grobelnik, Jožef Stefan Institute
Simon Gottschalk, L3S Research Center, Leibniz Universität Hannover
Nikola Tulechki, Ontotext AD
Daniel Gomes, Portuguese Web Archive
Eric Müller-Budack, TIB, Leibniz Information Centre for Science and Technology
Philipp Tiedt, VICO Research & Consulting GmbH
Christian Dirschl, Wolters Kluwer Deutschland
Basil Ell, University of Oslo
Eddy Maddalena, King's College London
Raquel Trillo-Lado, Universidad de Zaragoza
Ran Yu, GESIS – Leibniz Institute for the Social Sciences
Maribel Acosta, Karlsruhe Institute of Technology
Bernardo Pereira Nunes, Australian National University
Ankit Kariryaa, University of Copenhagen

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