Span-Level Model for Relation Extraction Kalpit Dixit author Yaser Al-Onaizan author 2019-07 text Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics Anna Korhonen editor David Traum editor Lluís Màrquez editor Association for Computational Linguistics Florence, Italy conference publication dixit-al-onaizan-2019-span 10.18653/v1/P19-1525 https://aclanthology.org/P19-1525/ 2019-07 5308 5314