Sungjin Lee Extrinsic Evaluation of Dialog State Tracking and Predictive Metrics for Dialog Policy Optimization. 310-317 2014 SIGDIAL Conference https://doi.org/10.3115/v1/w14-4342 https://aclanthology.org/W14-4342/ conf/sigdial/2014 db/conf/sigdial/sigdial2014.html#Lee14a