ZPR2: Joint Zero Pronoun Recovery and Resolution using Multi-Task Learning and BERT Linfeng Song author Kun Xu author Yue Zhang author Jianshu Chen author Dong Yu author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication song-etal-2020-zpr2 10.18653/v1/2020.acl-main.482 https://aclanthology.org/2020.acl-main.482/ 2020-07 5429 5434