@inproceedings{collins-carpenter-penn:2004:ACL,
  author    = {Collins, Christopher  and  Carpenter, Bob  and  Penn, Gerald},
  title     = {Head-Driven Parsing for Word Lattices},
  booktitle = {Proceedings of the 42nd Meeting of the Association for Computational Linguistics (ACL'04), Main Volume},
  year      = 2004,
  month     = {July},
  address   = {Barcelona, Spain},
  pages     = {231--238}
}