Unsupervised Opinion Summarization as Copycat-Review Generation Arthur Bražinskas author Mirella Lapata author Ivan Titov 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 brazinskas-etal-2020-unsupervised 10.18653/v1/2020.acl-main.461 https://aclanthology.org/2020.acl-main.461/ 2020-07 5151 5169