Quantitative and Qualitative Evaluation of Darpa Communicator Spoken Dialogue Systems Marilyn A Walker author Rebecca Passonneau author Julie E Boland author 2001-07 text Proceedings of the 39th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Toulouse, France conference publication walker-etal-2001-quantitative 10.3115/1073012.1073078 https://aclanthology.org/P01-1066/ 2001-07 515 522