CaLcs: Continuously Approximating Longest Common Subsequence for Sequence Level Optimization Semih Yavuz author Chung-Cheng Chiu author Patrick Nguyen author Yonghui Wu author 2018-oct-nov text Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing Ellen Riloff editor David Chiang editor Julia Hockenmaier editor Jun’ichi Tsujii editor Association for Computational Linguistics Brussels, Belgium conference publication yavuz-etal-2018-calcs 10.18653/v1/D18-1406 https://aclanthology.org/D18-1406/ 2018-oct-nov 3708 3718