Can Document Selection Help Semi-supervised Learning? A Case Study On Event Extraction Shasha Liao author Ralph Grishman author 2011-06 text Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies Dekang Lin editor Yuji Matsumoto editor Rada Mihalcea editor Association for Computational Linguistics Portland, Oregon, USA conference publication liao-grishman-2011-document https://aclanthology.org/P11-2045/ 2011-06 260 265