BRIO: Bringing Order to Abstractive Summarization Yixin Liu author Pengfei Liu author Dragomir Radev author Graham Neubig 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 liu-etal-2022-brio 10.18653/v1/2022.acl-long.207 https://aclanthology.org/2022.acl-long.207/ 2022-05 2890 2903