Learning Relatedness between Types with Prototypes for Relation Extraction Lisheng Fu author Ralph Grishman author 2021-04 text Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Main Volume Paola Merlo editor Jorg Tiedemann editor Reut Tsarfaty editor Association for Computational Linguistics Online conference publication fu-grishman-2021-learning 10.18653/v1/2021.eacl-main.172 https://aclanthology.org/2021.eacl-main.172/ 2021-04 2011 2016