Refining Event Extraction through Cross-Document Inference Heng Ji author Ralph Grishman author 2008-06 text Proceedings of ACL-08: HLT Johanna D Moore editor Simone Teufel editor James Allan editor Sadaoki Furui editor Association for Computational Linguistics Columbus, Ohio conference publication ji-grishman-2008-refining https://aclanthology.org/P08-1030/ 2008-06 254 262