@mastersthesis{McKeown79,
  author	= {McKeown, K. R.},
  year		= {1979},
  title		= {Paraphrasing using given and new information in a question-answer system},
  note		= {Number MS-CIS-80-13. Also appeared in \em Proceedings of the Seventeenth Annual Meeting of the Association for Computational Linguistics, August 1979, pp. 67-72.},
  address	= {Philadelphia},
  school	= {University of Pennsylvania}
}