Gradient Imitation Reinforcement Learning for Low Resource Relation Extraction Xuming Hu author Chenwei Zhang author Yawen Yang author Xiaohe Li author Li Lin author Lijie Wen author Philip S Yu author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication hu-etal-2021-gradient 10.18653/v1/2021.emnlp-main.216 https://aclanthology.org/2021.emnlp-main.216/ 2021-11 2737 2746