A Training-free and Reference-free Summarization Evaluation Metric via Centrality-weighted Relevance and Self-referenced Redundancy Wang Chen author Piji Li author Irwin King author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication chen-etal-2021-training 10.18653/v1/2021.acl-long.34 https://aclanthology.org/2021.acl-long.34/ 2021-08 404 414