@inproceedings{kim-etal-2009-overview,
    title = "Overview of {B}io{NLP}`09 Shared Task on Event Extraction",
    author = "Kim, Jin-Dong  and
      Ohta, Tomoko  and
      Pyysalo, Sampo  and
      Kano, Yoshinobu  and
      Tsujii, Jun{'}ichi",
    editor = "Tsujii, Jun{'}ichi",
    booktitle = "Proceedings of the {B}io{NLP} 2009 Workshop Companion Volume for Shared Task",
    month = jun,
    year = "2009",
    address = "Boulder, Colorado",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W09-1401/",
    pages = "1--9"
}