That is a Known Lie: Detecting Previously Fact-Checked Claims Shaden Shaar author Nikolay Babulkov author Giovanni Da San Martino author Preslav Nakov author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication shaar-etal-2020-known 10.18653/v1/2020.acl-main.332 https://aclanthology.org/2020.acl-main.332/ 2020-07 3607 3618