Simplifying annotation of intersections in time normalization annotation: exploring syntactic and semantic validation Peiwen Su author Steven Bethard author 2021-11 text Proceedings of the Joint 15th Linguistic Annotation Workshop (LAW) and 3rd Designing Meaning Representations (DMR) Workshop Claire Bonial editor Nianwen Xue editor Association for Computational Linguistics Punta Cana, Dominican Republic conference publication su-bethard-2021-simplifying 10.18653/v1/2021.law-1.11 https://aclanthology.org/2021.law-1.11/ 2021-11 106 111