Lifelong Event Detection with Knowledge Transfer Pengfei Yu author Heng Ji author Prem Natarajan 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 yu-etal-2021-lifelong 10.18653/v1/2021.emnlp-main.428 https://aclanthology.org/2021.emnlp-main.428/ 2021-11 5278 5290