Tense Trees as the “Fine Structure” of Discourse Chung Hee Hwang author Lenhart K Schubert author 1992-06 text 30th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Newark, Delaware, USA conference publication hwang-schubert-1992-tense 10.3115/981967.981997 https://aclanthology.org/P92-1030/ 1992-06 232 240