Adversarial Examples for Evaluating Reading Comprehension Systems Robin Jia author Percy Liang author 2017-09 text Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing Martha Palmer editor Rebecca Hwa editor Sebastian Riedel editor Association for Computational Linguistics Copenhagen, Denmark conference publication jia-liang-2017-adversarial 10.18653/v1/D17-1215 https://aclanthology.org/D17-1215/ 2017-09 2021 2031