@inproceedings{NakovDaSanMartinoElsayedetal.2022, author = {Preslav Nakov and Giovanni Da San Martino and Tamer Elsayed and Alberto Barr{\´o}n-Cede{\~n}o and R{\´u}ben M{\´i}guez and Shaden Shaar and Firoj Alam and Fatima Haouari and Maram Hasanain and Nikolay Babulkov and Alex Nikolov and Gautam Kishore Shahi and Julia Maria Struß and Thomas Mandl}, title = {The CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News}, booktitle = {Advances in Information Retrieval}, pages = {639 -- 649}, doi = {10.1007/978-3-030-72240-1_75}, year = {2022}, }