A Rational Reconstruction of the PROTEUS Sentence Planner Graeme Ritchie author 1984-07 text 10th International Conference on Computational Linguistics and 22nd Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Stanford, California, USA conference publication ritchie-1984-rational 10.3115/980491.980557 https://aclanthology.org/P84-1066/ 1984-07 327 329