@InProceedings{madnani-cahill:2014:W14-18,
  author    = {Madnani, Nitin  and  Cahill, Aoife},
  title     = {An Explicit Feedback System for Preposition Errors based on Wikipedia Revisions},
  booktitle = {Proceedings of the Ninth Workshop on Innovative Use of NLP for Building Educational Applications},
  month     = {June},
  year      = {2014},
  address   = {Baltimore, Maryland},
  publisher = {Association for Computational Linguistics},
  pages     = {79--88},
  url       = {http://www.aclweb.org/anthology/W14-1810}
}