Revisiting Unsupervised Relation Extraction Thy Thy Tran author Phong Le author Sophia Ananiadou 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 tran-etal-2020-revisiting 10.18653/v1/2020.acl-main.669 https://aclanthology.org/2020.acl-main.669/ 2020-07 7498 7505