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Experimental IR Meets Multilinguality, Multimodality, and Interaction - 12th International Conference of the CLEF Association, CLEF 2021, Virtual Event, September 21-24, 2021, Proceedings

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Audio Features, Precomputed for Podcast Retrieval and Information Access Experiments
Abigail Alexander | Matthijs Mars | Josh C. Tingey | Haoyue Yu | Chris Backhouse | Sravana Reddy | Jussi Karlgren

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A Hybrid Approach for Stock Market Prediction Using Financial News and Stocktwits
Alaa Alhamzeh | Saptarshi Mukhopadhaya | Salim Hafid | Alexandre Bremard | Elöd Egyed-Zsigmond | Harald Kosch | Lionel Brunie

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Dataset Creation Framework for Personalized Type-Based Facet Ranking Tasks Evaluation
Esraa Ali | Annalina Caputo | Séamus Lawless | Owen Conlan

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SubjectivITA: An Italian Corpus for Subjectivity Detection in Newspapers
Francesco Antici | Luca Bolognini | Matteo Antonio Inajetovic | Bogdan Ivasiuk | Andrea Galassi | Federico Ruggeri

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Evaluating Elements of Web-Based Data Enrichment for Pseudo-relevance Feedback Retrieval
Timo Breuer | Melanie Pest | Philipp Schaer

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End-to-End Fine-Grained Neural Entity Recognition of Patients, Interventions, Outcomes
Anjani Dhrangadhariya | Gustavo Aguilar | Thamar Solorio | Roger Hilfiker | Henning Müller

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Comparing Traditional and Neural Approaches for Detecting Health-Related Misinformation
Marcos Fernández-Pichel | David E. Losada | Juan Carlos Pichel | David Elsweiler

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Towards the Evaluation of Information Retrieval Systems on Evolving Datasets with Pivot Systems
Gabriela Nicole González Sáez | Philippe Mulhem | Lorraine Goeuriot

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A Multi-Task Learning Model for Multidimensional Relevance Assessment
Divi Galih Prasetyo Putri | Marco Viviani | Gabriella Pasi

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Skill Extraction for Domain-Specific Text Retrieval in a Job-Matching Platform
Ellery Smith | Andreas Weiler | Martin Braschler

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Linguistic Uncertainty in Clinical NLP: A Taxonomy, Dataset and Approach
Mark Turner | Julia Ive | Sumithra Velupillai

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Self-calibrating Neural-Probabilistic Model for Authorship Verification Under Covariate Shift
Benedikt T. Boenninghoff | Dorothea Kolossa | Robert M. Nickel

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Priberam at MESINESP Multi-label Classification of Medical Texts Task
Rúben Cardoso | Zita Marinho | Afonso Mendes | Sebastião Miranda

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Herbarium-Field Triplet Network for Cross-Domain Plant Identification
Sophia Chulif | Yang Loong Chang

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BERT-Based Transformers for Early Detection of Mental Health Illnesses
Rodrigo Martínez-Castaño | Amal Htait | Leif Azzopardi | Yashar Moshfeghi

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Dowsing for Math Answers
Yin Ki Ng | Dallas J. Fraser | Besat Kassaie | Frank Wm. Tompa

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Overview of ARQMath-2 (2021): Second CLEF Lab on Answer Retrieval for Questions on Math
Behrooz Mansouri | Richard Zanibbi | Douglas W. Oard | Anurag Agarwal

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Overview of BioASQ 2021: The Ninth BioASQ Challenge on Large-Scale Biomedical Semantic Indexing and Question Answering
Anastasios Nentidis | Georgios Katsimpras | Eirini Vandorou | Anastasia Krithara | Luis Gascó | Martin Krallinger | Georgios Paliouras

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Overview of the CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News
Preslav Nakov | Giovanni Da San Martino | Tamer Elsayed | Alberto Barrón-Cedeño | Rubén Míguez | Shaden Shaar | Firoj Alam | Fatima Haouari | Maram Hasanain | Watheq Mansour | Bayan Hamdan | Zien Sheikh Ali | Nikolay Babulkov | Alex Nikolov | Gautam Kishore Shahi | Julia Maria Struß | Thomas Mandl | Mücahid Kutlu | Yavuz Selim Kartal

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Overview of ChEMU 2021: Reaction Reference Resolution and Anaphora Resolution in Chemical Patents
Yuan Li | Biaoyan Fang | Jiayuan He | Hiyori Yoshikawa | Saber A. Akhondi | Christian Druckenbrodt | Camilo Thorne | Zubair Afzal | Zenan Zhai | Timothy Baldwin | Karin Verspoor

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Overview of the CLEF eHealth Evaluation Lab 2021
Hanna Suominen | Lorraine Goeuriot | Liadh Kelly | Laura Alonso Alemany | Elias Bassani | Nicola Brew-Sam | Viviana Cotik | Darío Filippo | Gabriela González Sáez | Franco Luque | Philippe Mulhem | Gabriella Pasi | Roland Roller | Sandaru Seneviratne | Rishabh Upadhyay | Jorge Vivaldi | Marco Viviani | Chenchen Xu

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Overview of eRisk 2021: Early Risk Prediction on the Internet
Javier Parapar | Patricia Martín-Rodilla | David E. Losada | Fabio Crestani

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Overview of the ImageCLEF 2021: Multimedia Retrieval in Medical, Nature, Internet and Social Media Applications
Bogdan Ionescu | Henning Müller | Renaud Péteri | Asma Ben Abacha | Mourad Sarrouti | Dina Demner-Fushman | Sadid A. Hasan | Serge Kozlovski | Vitali Liauchuk | Yashin Dicente Cid | Vassili Kovalev | Obioma Pelka | Alba García Seco de Herrera | Janadhip Jacutprakart | Christoph M. Friedrich | Raul Berari | Andrei Tauteanu | Dimitri Fichou | Paul Brie | Mihai Dogariu | Liviu-Daniel Stefan | Mihai Gabriel Constantin | Jon Chamberlain | Antonio Campello | Adrian F. Clark | Thomas Oliver | Hassan Moustahfid | Adrian Popescu | Jerome Deshayes-Chossart

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Overview of LifeCLEF 2021: An Evaluation of Machine-Learning Based Species Identification and Species Distribution Prediction
Alexis Joly | Hervé Goëau | Stefan Kahl | Lukás Picek | Titouan Lorieul | Elijah Cole | Benjamin Deneu | Maximilien Servajean | Andrew Durso | Isabelle Bolon | Hervé Glotin | Robert Planqué | Rafael Luis Ruiz De Castaneda | Willem-Pier Vellinga | Holger Klinck | Tom Denton | Ivan Eggel | Pierre Bonnet | Henning Müller

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Overview of LiLAS 2021 - Living Labs for Academic Search
Philipp Schaer | Timo Breuer | Leyla Jael Castro | Benjamin Wolff | Johann Schaible | Narges Tavakolpoursaleh

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Overview of PAN 2021: Authorship Verification, Profiling Hate Speech Spreaders on Twitter, and Style Change Detection
Janek Bevendorff | Berta Chulvi | Gretel Liz De la Peña Sarracén | Mike Kestemont | Enrique Manjavacas | Ilia Markov | Maximilian Mayerl | Martin Potthast | Francisco Rangel | Paolo Rosso | Efstathios Stamatatos | Benno Stein | Matti Wiegmann | Magdalena Wolska | Eva Zangerle

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Overview of SimpleText 2021 - CLEF Workshop on Text Simplification for Scientific Information Access
Liana Ermakova | Patrice Bellot | Pavel Braslavski | Jaap Kamps | Josiane Mothe | Diana Nurbakova | Irina Ovchinnikova | Eric SanJuan

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Overview of Touché 2021: Argument Retrieval
Alexander Bondarenko | Lukas Gienapp | Maik Fröbe | Meriem Beloucif | Yamen Ajjour | Alexander Panchenko | Chris Biemann | Benno Stein | Henning Wachsmuth | Martin Potthast | Matthias Hagen