Event Detection and Factuality Assessment with Non-Expert Supervision Kenton Lee author Yoav Artzi author Yejin Choi author Luke Zettlemoyer author 2015-09 text Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing Lluís Màrquez editor Chris Callison-Burch editor Jian Su editor Association for Computational Linguistics Lisbon, Portugal conference publication lee-etal-2015-event 10.18653/v1/D15-1189 https://aclanthology.org/D15-1189/ 2015-09 1643 1648