Unified Expectation Maximization Rajhans Samdani author Ming-Wei Chang author Dan Roth author 2012-06 text Proceedings of the 2012 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies Eric Fosler-Lussier editor Ellen Riloff editor Srinivas Bangalore editor Association for Computational Linguistics Montréal, Canada conference publication samdani-etal-2012-unified https://aclanthology.org/N12-1087/ 2012-06 688 698