A Plan Recognition Model for Clarification Subdialogues Diane J Litman author James F Allen 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 litman-allen-1984-plan 10.3115/980491.980554 https://aclanthology.org/P84-1063/ 1984-07 302 311