@inproceedings{NakovDaSanMartinoElsayedetal.2022, author = {Preslav Nakov and Giovanni Da San Martino and Tamer Elsayed and Alberto Barr{\´o}n-Cede{\~n}o and Rub{\´e}n M{\´i}guez and Shaden Shaar and Firoj Alam and Fatima Haouari and Maram Hasanain and Watheq Mansour and Bayan Hamdan and Zien Sheikh Ali and Nikolay Babulkov and Alex Nikolov and Gautam Koshore Shahi and Julia Maria Struß and Thomas Mandl and Mucahid Kutlu and Yavuz Selim Kartal}, title = {Overview of the CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News}, booktitle = {Experimental IR Meets Multilinguality, Multimodality, and Interaction}, pages = {264 -- 291}, doi = {10.1007/978-3-030-85251-1_19}, year = {2022}, }