@InProceedings{schmid:2006:COLACL,
  author    = {Schmid, Helmut},
  title     = {Trace Prediction and Recovery with Unlexicalized PCFGs and Slash Features},
  booktitle = {Proceedings of the 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics},
  month     = {July},
  year      = {2006},
  address   = {Sydney, Australia},
  publisher = {Association for Computational Linguistics},
  pages     = {177--184},
  url       = {http://www.aclweb.org/anthology/P06-1023},
  doi       = {10.3115/1220175.1220198}
}