Key points are not available for this paper at this time.
Bodhisattwa Prasad Majumder, Shuyang Li, Jianmo Ni, Julian McAuley. Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP). 2019.
Majumder et al. (Tue,) studied this question.