How to Thematically Segment Texts by using Lexical Cohesion? Olivier Ferret author 1998-08 text 36th Annual Meeting of the Association for Computational Linguistics and 17th International Conference on Computational Linguistics, Volume 2 Association for Computational Linguistics Montreal, Quebec, Canada conference publication ferret-1998-thematically-segment 10.3115/980691.980813 https://aclanthology.org/P98-2243/ 1998-08 1481 1483