@inproceedings{riedel-etal-2011-model,
    title = "Model Combination for Event Extraction in {B}io{NLP} 2011",
    author = "Riedel, Sebastian  and
      McClosky, David  and
      Surdeanu, Mihai  and
      McCallum, Andrew  and
      Manning, Christopher D.",
    editor = "Tsujii, Jun{'}ichi  and
      Kim, Jin-Dong  and
      Pyysalo, Sampo",
    booktitle = "Proceedings of {B}io{NLP} Shared Task 2011 Workshop",
    month = jun,
    year = "2011",
    address = "Portland, Oregon, USA",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W11-1808/",
    pages = "51--55"
}