@inproceedings{humphreys-etal-1997-event, title = "Event coreference for information extraction", author = "Humphreys, Kevin and Gaizauskas, Robert and Azzam, Saliha", booktitle = "Operational Factors in Practical, Robust Anaphora Resolution for Unrestricted Texts", year = "1997", url = "https://aclanthology.org/W97-1311/" }