@InProceedings{tonelli-cabrio:2012:PAPERS,
  author    = {Tonelli, Sara  and  Cabrio, Elena},
  title     = {Hunting for Entailing Pairs in the {P}enn Discourse Treebank},
  booktitle = {Proceedings of COLING 2012},
  month     = {December},
  year      = {2012},
  address   = {Mumbai, India},
  publisher = {The COLING 2012 Organizing Committee},
  pages     = {2653--2668},
  url       = {http://www.aclweb.org/anthology/C12-1162}
}