Hunting for Entailing Pairs in the Penn Discourse Treebank Sara Tonelli author Elena Cabrio author 2012-12 text Proceedings of COLING 2012 Martin Kay editor Christian Boitet editor The COLING 2012 Organizing Committee Mumbai, India conference publication tonelli-cabrio-2012-hunting https://aclanthology.org/C12-1162/ 2012-12 2653 2668