SemEval 2018 Task 6: Parsing Time Normalizations Egoitz Laparra author Dongfang Xu author Ahmed Elsayed author Steven Bethard author Martha Palmer author 2018-06 text Proceedings of the 12th International Workshop on Semantic Evaluation Marianna Apidianaki editor Saif M Mohammad editor Jonathan May editor Ekaterina Shutova editor Steven Bethard editor Marine Carpuat editor Association for Computational Linguistics New Orleans, Louisiana conference publication laparra-etal-2018-semeval 10.18653/v1/S18-1011 https://aclanthology.org/S18-1011/ 2018-06 88 96