Key points are not available for this paper at this time.
Arman Cohan, Iz Beltagy, Daniel King, Bhavana Dalvi, Dan Weld. 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.
Cohan et al. (Tue,) studied this question.