@inproceedings{yu-etal-2021-lifelong,
    title = "Lifelong Event Detection with Knowledge Transfer",
    author = "Yu, Pengfei  and
      Ji, Heng  and
      Natarajan, Prem",
    editor = "Moens, Marie-Francine  and
      Huang, Xuanjing  and
      Specia, Lucia  and
      Yih, Scott Wen-tau",
    booktitle = "Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing",
    month = nov,
    year = "2021",
    address = "Online and Punta Cana, Dominican Republic",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/2021.emnlp-main.428/",
    doi = "10.18653/v1/2021.emnlp-main.428",
    pages = "5278--5290"
}