On the Acquisition of Lexical Entries: The Perceptual Origin of Thematic Relations James Pustejovsky author 1987-07 text 25th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Stanford, California, USA conference publication pustejovsky-1987-acquisition 10.3115/981175.981199 https://aclanthology.org/P87-1024/ 1987-07 172 178