SUPERT: Towards New Frontiers in Unsupervised Evaluation Metrics for Multi-Document Summarization Yang Gao author Wei Zhao author Steffen Eger author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication gao-etal-2020-supert 10.18653/v1/2020.acl-main.124 https://aclanthology.org/2020.acl-main.124/ 2020-07 1347 1354