That is a Known Lie: Detecting Previously Fact-Checked Claims. - Shaden Shaar; Nikolay Babulkov; Giovanni Da San Martino; Preslav Nakov (ACL, 2020)

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 (CLEF, 2020)

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 (CLEF (Working Notes), 2020)

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; et al. (CLEF, 2021)

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 (CLEF (Working Notes), 2021)

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; et al. (ECIR (2), 2021)

Overview of the CLEF-2022 CheckThat! Lab on Fighting the COVID-19 Infodemic and Fake News Detection. - Preslav Nakov; Alberto Barrón-Cedeño; Giovanni Da San Martino; Firoj Alam; Julia Maria Struß; Thomas Mandl 001; Rubén Míguez; Tommaso Caselli; Mücahid Kutlu; Wajdi Zaghouani; Chengkai Li 001; Shaden Shaar; et al. (CLEF, 2022)

Overview of the CLEF-2022 CheckThat! Lab Task 2 on Detecting Previously Fact-Checked Claims. - Preslav Nakov; Giovanni Da San Martino; Firoj Alam; Shaden Shaar; Hamdy Mubarak; Nikolay Babulkov (CLEF (Working Notes), 2022)

The CLEF-2022 CheckThat! Lab on Fighting the COVID-19 Infodemic and Fake News Detection. - Preslav Nakov; Alberto Barrón-Cedeño; Giovanni Da San Martino; Firoj Alam; Julia Maria Struß; Thomas Mandl 001; Rubén Míguez; Tommaso Caselli; Mücahid Kutlu; Wajdi Zaghouani; Chengkai Li 001; Shaden Shaar; et al. (ECIR (2), 2022)