CopyBERT: A Unified Approach to Question Generation with Self-Attention Stalin Varanasi author Saadullah Amin author Guenter Neumann author 2020-07 text Proceedings of the 2nd Workshop on Natural Language Processing for Conversational AI Tsung-Hsien Wen editor Asli Celikyilmaz editor Zhou Yu editor Alexandros Papangelis editor Mihail Eric editor Anuj Kumar editor Iñigo Casanueva editor Rushin Shah editor Association for Computational Linguistics Online conference publication varanasi-etal-2020-copybert 10.18653/v1/2020.nlp4convai-1.3 https://aclanthology.org/2020.nlp4convai-1.3/ 2020-07 25 31