Combining Spans into Entities: A Neural Two-Stage Approach for Recognizing Discontiguous Entities Bailin Wang author Wei Lu 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 wang-lu-2019-combining 10.18653/v1/D19-1644 https://aclanthology.org/D19-1644/ 2019-11 6216 6224