How Many Users Are Enough? Exploring Semi-Supervision and Stylometric Features to Uncover a Russian Troll Farm Nayeema Nasrin author Kim-Kwang Raymond Choo author Myung Ko author Anthony Rios author 2019-11 text Proceedings of the Second Workshop on Natural Language Processing for Internet Freedom: Censorship, Disinformation, and Propaganda Anna Feldman editor Giovanni Da San Martino editor Alberto Barrón-Cedeño editor Chris Brew editor Chris Leberknight editor Preslav Nakov editor Association for Computational Linguistics Hong Kong, China conference publication nasrin-etal-2019-many 10.18653/v1/D19-5003 https://aclanthology.org/D19-5003/ 2019-11 20 30