2023

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Detecting Stance of Authorities Towards Rumors in Arabic Tweets: A Preliminary Study
Fatima Haouari | Tamer Elsayed
Advances in Information Retrieval - 45th European Conference on Information Retrieval, ECIR 2023, Dublin, Ireland, April 2-6, 2023, Proceedings, Part II

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The CLEF-2023 CheckThat! Lab: Checkworthiness, Subjectivity, Political Bias, Factuality, and Authority
Alberto Barrón-Cedeño | Firoj Alam | Tommaso Caselli | Giovanni Da San Martino | Tamer Elsayed | Andrea Galassi | Fatima Haouari | Federico Ruggeri | Julia Maria Struß | Rabindra Nath Nandi | Gullal S. Cheema | Dilshod Azizov | Preslav Nakov
Advances in Information Retrieval - 45th European Conference on Information Retrieval, ECIR 2023, Dublin, Ireland, April 2-6, 2023, Proceedings, Part III

2022

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Evidence-Based Early Rumor Verification in Social Media
Fatima Haouari
Advances in Information Retrieval - 44th European Conference on IR Research, ECIR 2022, Stavanger, Norway, April 10-14, 2022, Proceedings, Part II

2021

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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
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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Overview of the CLEF-2021 CheckThat! Lab Task 2 on Detecting Previously Fact-Checked Claims in Tweets and Political Debates
Shaden Shaar | Fatima Haouari | Watheq Mansour | Maram Hasanain | Nikolay Babulkov | Firoj Alam | Giovanni Da San Martino | Tamer Elsayed | Preslav Nakov
Proceedings of the Working Notes of CLEF 2021 - Conference and Labs of the Evaluation Forum, Bucharest, Romania, September 21st - to - 24th, 2021

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Overview of the CLEF-2021 CheckThat! Lab Task 1 on Check-Worthiness Estimation in Tweets and Political Debates
Shaden Shaar | Maram Hasanain | Bayan Hamdan | Zien Sheikh Ali | Fatima Haouari | Alex Nikolov | Mücahid Kutlu | Yavuz Selim Kartal | Firoj Alam | Giovanni Da San Martino | Alberto Barrón-Cedeño | Rubén Míguez | Javier Beltrán | Tamer Elsayed | Preslav Nakov
Proceedings of the Working Notes of CLEF 2021 - Conference and Labs of the Evaluation Forum, Bucharest, Romania, September 21st - to - 24th, 2021

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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 | Nikolay Babulkov | Alex Nikolov | Gautam Kishore Shahi | Julia Maria Struß | Thomas Mandl
Advances in Information Retrieval - 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 - April 1, 2021, Proceedings, Part II

2020

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bigIR at TREC 2020: Simple but Deep Retrieval of Passages and Documents
Fatima Haouari | Marwa Essam | Tamer Elsayed
Proceedings of the Twenty-Ninth Text REtrieval Conference, TREC 2020, Virtual Event [Gaithersburg, Maryland, USA], November 16-20, 2020

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Overview of CheckThat! 2020: Automatic Identification and Verification of Claims in Social Media
Alberto Barrón-Cedeño | Tamer Elsayed | Preslav Nakov | Giovanni Da San Martino | Maram Hasanain | Reem Suwaileh | Fatima Haouari | Nikolay Babulkov | Bayan Hamdan | Alex Nikolov | Shaden Shaar | Zien Sheikh Ali
Experimental IR Meets Multilinguality, Multimodality, and Interaction - 11th International Conference of the CLEF Association, CLEF 2020, Thessaloniki, Greece, September 22-25, 2020, Proceedings

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Overview of CheckThat! 2020i Arabic: Automatic Identification and Verification of Claims in Social Media
Maram Hasanain | Fatima Haouari | Reem Suwaileh | Zien Sheikh Ali | Bayan Hamdan | Tamer Elsayed | Alberto Barrón-Cedeño | Giovanni Da San Martino | Preslav Nakov
Working Notes of CLEF 2020 - Conference and Labs of the Evaluation Forum, Thessaloniki, Greece, September 22-25, 2020

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Overview of CheckThat! 2020 English: Automatic Identification and Verification of Claims in Social Media
Shaden Shaar | Alex Nikolov | Nikolay Babulkov | Firoj Alam | Alberto Barrón-Cedeño | Tamer Elsayed | Maram Hasanain | Reem Suwaileh | Fatima Haouari | Giovanni Da San Martino | Preslav Nakov
Working Notes of CLEF 2020 - Conference and Labs of the Evaluation Forum, Thessaloniki, Greece, September 22-25, 2020

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CheckThat! at CLEF 2020: Enabling the Automatic Identification and Verification of Claims in Social Media
Alberto Barrón-Cedeño | Tamer Elsayed | Preslav Nakov | Giovanni Da San Martino | Maram Hasanain | Reem Suwaileh | Fatima Haouari
Advances in Information Retrieval - 42nd European Conference on IR Research, ECIR 2020, Lisbon, Portugal, April 14-17, 2020, Proceedings, Part II

2019

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bigIR at CLEF 2019: Automatic Verification of Arabic Claims over the Web
Fatima Haouari | Zien Sheikh Ali | Tamer Elsayed
Working Notes of CLEF 2019 - Conference and Labs of the Evaluation Forum, Lugano, Switzerland, September 9-12, 2019