Diamonds in the Rough: Event Extraction from Imperfect Microblog Data Ander Intxaurrondo author Eneko Agirre author Oier Lopez de Lacalle author Mihai Surdeanu author 2015-may–jun text Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Rada Mihalcea editor Joyce Chai editor Anoop Sarkar editor Association for Computational Linguistics Denver, Colorado conference publication intxaurrondo-etal-2015-diamonds 10.3115/v1/N15-1066 https://aclanthology.org/N15-1066/ 2015-may–jun 641 650