Improving Lexically Constrained Neural Machine Translation with Source-Conditioned Masked Span Prediction Gyubok Lee author Seongjun Yang author Edward Choi 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 2: Short Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication lee-etal-2021-improving 10.18653/v1/2021.acl-short.94 https://aclanthology.org/2021.acl-short.94/ 2021-08 743 753