Multi-Agent Mutual Learning at Sentence-Level and Token-Level for Neural Machine Translation Baohao Liao author Yingbo Gao author Hermann Ney author 2020-11 text Findings of the Association for Computational Linguistics: EMNLP 2020 Trevor Cohn editor Yulan He editor Yang Liu editor Association for Computational Linguistics Online conference publication liao-etal-2020-multi 10.18653/v1/2020.findings-emnlp.155 https://aclanthology.org/2020.findings-emnlp.155/ 2020-11 1715 1724