Closed-book Question Generation via Contrastive Learning Xiangjue Dong author Jiaying Lu author Jianling Wang author James Caverlee author 2023-05 text Proceedings of the 17th Conference of the European Chapter of the Association for Computational Linguistics Andreas Vlachos editor Isabelle Augenstein editor Association for Computational Linguistics Dubrovnik, Croatia conference publication dong-etal-2023-closed 10.18653/v1/2023.eacl-main.230 https://aclanthology.org/2023.eacl-main.230/ 2023-05 3150 3162