Hierarchically-Refined Label Attention Network for Sequence Labeling Leyang Cui author Yue Zhang 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 cui-zhang-2019-hierarchically 10.18653/v1/D19-1422 https://aclanthology.org/D19-1422/ 2019-11 4115 4128