Primitives of Events and the Semantic Representation Hongzhi Xu author Chu-Ren Huang author 2013-09 text Proceedings of the 6th International Conference on Generative Approaches to the Lexicon (GL2013) James Pustejovsky editor Association for Computational Linguistics Pisa, Italy conference publication xu-huang-2013-primitives https://aclanthology.org/W13-5408/ 2013-09 54 61