@InProceedings{charniak-EtAl:2006:HLT-NAACL06-Main,
  author    = {Charniak, Eugene  and  Johnson, Mark  and  Elsner, Micha  and  Austerweil, Joseph  and  Ellis, David  and  Haxton, Isaac  and  Hill, Catherine  and  Shrivaths, R.  and  Moore, Jeremy  and  Pozar, Michael  and  Vu, Theresa},
  title     = {Multilevel Coarse-to-Fine PCFG Parsing},
  booktitle = {Proceedings of the Human Language Technology Conference of the NAACL, Main Conference},
  month     = {June},
  year      = {2006},
  address   = {New York City, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {168--175},
  url       = {http://www.aclweb.org/anthology/N/N06/N06-1022}
}