Unsupervised Learning of Narrative Schemas and their Participants Nathanael Chambers author Dan Jurafsky author 2009-08 text Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP Keh-Yih Su editor Jian Su editor Janyce Wiebe editor Haizhou Li editor Association for Computational Linguistics Suntec, Singapore conference publication chambers-jurafsky-2009-unsupervised https://aclanthology.org/P09-1068/ 2009-08 602 610