KEPLER: A Unified Model for Knowledge Embedding and Pre-trained Language Representation Xiaozhi Wang author Tianyu Gao author Zhaocheng Zhu author Zhengyan Zhang author Zhiyuan Liu author Juanzi Li author Jian Tang author 2021 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal wang-etal-2021-kepler 10.1162/tacl_a_00360 https://aclanthology.org/2021.tacl-1.11/ 2021 9 176 194