SPS: A Formalism for Semantic Interpretation and its Use in Processing Prepositions that Reference Space Norman K Sondheimer author Doyt Perry author 1975-11 text journal article American Journal of Computational Linguistics continuing periodical academic journal Microfiche 34 sondheimer-perry-1975-sps https://aclanthology.org/J75-4027/ 1975-11 49 63