Liu, Kai, Xin Liu, An Yang, Jing Liu, Jinsong Su, Sujian Li, and Qiaoqiao She. 2020. “A Robust Adversarial Training Approach to Machine Reading Comprehension”. Proceedings of the AAAI Conference on Artificial Intelligence 34 (05):8392-8400. https://doi.org/10.1609/aaai.v34i05.6357.