@InProceedings{zhang-zhao-hui:2012:DEMOS,
  author    = {Zhang, Xiaotian  and  Zhao, Hai  and  Hui, Cong},
  title     = {A Machine Learning Approach to Convert {CCGbank} to {P}enn Treebank},
  booktitle = {Proceedings of COLING 2012: Demonstration Papers},
  month     = {December},
  year      = {2012},
  address   = {Mumbai, India},
  publisher = {The COLING 2012 Organizing Committee},
  pages     = {535--542},
  url       = {http://www.aclweb.org/anthology/C12-3067}
}