Covington Variations Svetoslav Marinov author 2007-06 text Proceedings of the 2007 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning (EMNLP-CoNLL) Jason Eisner editor Association for Computational Linguistics Prague, Czech Republic conference publication marinov-2007-covington https://aclanthology.org/D07-1125/ 2007-06 1144 1148