Key points are not available for this paper at this time.
Mario Ezra Aragón, Adrian Pastor López-Monroy, Luis Carlos González-Gurrola, Manuel Montes-y-Gómez. Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers). 2019.
Aragón et al. (Tue,) studied this question.