The Impact of Task and Corpus on Event Extraction Systems Ralph Grishman author 2010-05 text Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC’10) Nicoletta Calzolari editor Khalid Choukri editor Bente Maegaard editor Joseph Mariani editor Jan Odijk editor Stelios Piperidis editor Mike Rosner editor Daniel Tapias editor European Language Resources Association (ELRA) Valletta, Malta conference publication grishman-2010-impact https://aclanthology.org/L10-1389/ 2010-05