Covid or not Covid? Topic Shift in Information Cascades on Twitter Liana Ermakova author Diana Nurbakova author Irina Ovchinnikova author 2020-12 text Proceedings of the 3rd International Workshop on Rumours and Deception in Social Media (RDSM) Ahmet Aker editor Arkaitz Zubiaga editor Association for Computational Linguistics Barcelona, Spain (Online) conference publication ermakova-etal-2020-covid https://aclanthology.org/2020.rdsm-1.3/ 2020-12 32 37