@inproceedings{ahn-2006-stages,
    title = "The stages of event extraction",
    author = "Ahn, David",
    editor = "Boguraev, Branimir  and
      Mu{\~n}oz, Rafael  and
      Pustejovsky, James",
    booktitle = "Proceedings of the Workshop on Annotating and Reasoning about Time and Events",
    month = jul,
    year = "2006",
    address = "Sydney, Australia",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W06-0901",
    pages = "1--8",
}