Entity, Relation, and Event Extraction with Contextualized Span Representations David Wadden author Ulme Wennberg author Yi Luan author Hannaneh Hajishirzi author 2019-11 text Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) Kentaro Inui editor Jing Jiang editor Vincent Ng editor Xiaojun Wan editor Association for Computational Linguistics Hong Kong, China conference publication wadden-etal-2019-entity 10.18653/v1/D19-1585 https://aclanthology.org/D19-1585/ 2019-11 5784 5789