ParaMetric: An Automatic Evaluation Metric for Paraphrasing Chris Callison-Burch author Trevor Cohn author Mirella Lapata author 2008-08 text Proceedings of the 22nd International Conference on Computational Linguistics (Coling 2008) Donia Scott editor Hans Uszkoreit editor Coling 2008 Organizing Committee Manchester, UK conference publication callison-burch-etal-2008-parametric https://aclanthology.org/C08-1013/ 2008-08 97 104