BERTifying the Hidden Markov Model for Multi-Source Weakly Supervised Named Entity Recognition Yinghao Li author Pranav Shetty author Lucas Liu author Chao Zhang author Le Song author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication li-etal-2021-bertifying 10.18653/v1/2021.acl-long.482 https://aclanthology.org/2021.acl-long.482/ 2021-08 6178 6190