Open Relation Extraction: Relational Knowledge Transfer from Supervised Data to Unsupervised Data Ruidong Wu author Yuan Yao author Xu Han author Ruobing Xie author Zhiyuan Liu author Fen Lin author Leyu Lin author Maosong Sun author 2019-11 text Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) Kentaro Inui editor Jing Jiang editor Vincent Ng editor Xiaojun Wan editor Association for Computational Linguistics Hong Kong, China conference publication wu-etal-2019-open 10.18653/v1/D19-1021 https://aclanthology.org/D19-1021/ 2019-11 219 228