@incollection{Hirst:1992,
        title = {Mixed-Depth Representations of Natural Language Text},
        address = {Hillsdale (New Jersey), Hove and London},
        author = {Graeme Hirst and Mark Ryan},
        booktitle = {Text-Based Intelligent Systems: Current research and practice in information extraction and retrieval},
        editor = {Paul S. Jacobs},
        pages = {59-82},
        publisher = {Lawrence Erlbaum},
        year = 1992,
        url = {http://www.csri.utoronto.ca/\~{}pedmonds/cl-group/pubs/list-semantics.html},
        biburl = {http://www.bibsonomy.org/bibtex/2a90452cb1696d67f25aaa47ed64ebf86/diego_ma},
	keywords = {NLP ambiguity},
    }