On the Robustness of Question Rewriting Systems to Questions of Varying Hardness Hai Ye author Hwee Tou Ng author Wenjuan Han author 2022-05 text Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Smaranda Muresan editor Preslav Nakov editor Aline Villavicencio editor Association for Computational Linguistics Dublin, Ireland conference publication ye-etal-2022-robustness 10.18653/v1/2022.acl-long.149 https://aclanthology.org/2022.acl-long.149/ 2022-05 2100 2113