Columbia at SemEval-2019 Task 7: Multi-task Learning for Stance Classification and Rumour Verification Zhuoran Liu author Shivali Goel author Mukund Yelahanka Raghuprasad author Smaranda Muresan author 2019-06 text Proceedings of the 13th International Workshop on Semantic Evaluation Jonathan May editor Ekaterina Shutova editor Aurelie Herbelot editor Xiaodan Zhu editor Marianna Apidianaki editor Saif M Mohammad editor Association for Computational Linguistics Minneapolis, Minnesota, USA conference publication liu-etal-2019-columbia 10.18653/v1/S19-2194 https://aclanthology.org/S19-2194/ 2019-06 1110 1114