Do We Know What We Don’t Know? Studying Unanswerable Questions beyond SQuAD 2.0 Elior Sulem author Jamaal Hay author Dan Roth author 2021-11 text Findings of the Association for Computational Linguistics: EMNLP 2021 Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Punta Cana, Dominican Republic conference publication sulem-etal-2021-know-dont 10.18653/v1/2021.findings-emnlp.385 https://aclanthology.org/2021.findings-emnlp.385/ 2021-11 4543 4548