Semi-Supervised Event Extraction with Paraphrase Clusters James Ferguson author Colin Lockard author Daniel Weld author Hannaneh Hajishirzi author 2018-06 text Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 2 (Short Papers) Marilyn Walker editor Heng Ji editor Amanda Stent editor Association for Computational Linguistics New Orleans, Louisiana conference publication ferguson-etal-2018-semi 10.18653/v1/N18-2058 https://aclanthology.org/N18-2058/ 2018-06 359 364