@incollection{step2008:2221,
 author = "Clark, Peter and Harrison, Phil",
 title = "{Boeing's NLP System and the Challenges of Semantic Representation}",
 booktitle = "Semantics in Text Processing. STEP 2008 Conference Proceedings",
 editor = "Bos, Johan and Delmonte, Rodolfo",
 publisher = "College Publications",
 series = "Research in Computational Semantics",
 volume = "1",
 pages = "263--276",
 year = "2008",
 url = "http://www.aclweb.org/anthology/W08-2221"
}