@inproceedings{Echihabi:2003:ACL,
  author = {Echihabi, Abdessamad  and  Marcu, Daniel},
  title  = {A Noisy-Channel Approach to Question Answering},
  booktitle = {Proceedings of the 41st Annual Meeting of the Association for Computational Linguistics},
  editor = {Erhard Hinrichs and Dan Roth},
  url    = {http://www.aclweb.org/anthology/P03-1003.pdf},
  year   = 2003,
  pages  = {16--23}
}