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First page of <bold>Natural Language Processing with Python Steven Bird, Ewan Klein, and Edward Loper</bold> (University of Melbourne, University of Edinburgh, and BBN Technologies) Sebastopol, CA: O'Reilly Media, 2009, xx+482 pp; paperbound, ISBN 978-0-596-51649-9, $44.99; on-line free of charge at <ext-link ext-link-type="url" href="http://nltk.org/book" type="simple">nltk.org/book</ext-link>