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Natural Language Toolkit (NLTK) www.nltk.orgAuthors: Steven Bird <firstname.lastname@example.org> Edward Loper <email@example.com> Ewan Klein <firstname.lastname@example.org>Copyright (C) 2001-2012 NLTK ProjectFor license information, see LICENSE.txtNLTK -- the Natural Language Toolkit -- is a suite of open sourcePython modules, data sets and tutorials supporting research anddevelopment in Natural Language Processing.Documentation: A substantial amount of documentation about howto use NLTK, including a textbook and API documention, isavailable from the NLTK website: http://www.nltk.org/ - The book covers a wide range of introductory topics in NLP, and shows how to do all the processing tasks using the toolkit. - The toolkit's reference documentation describes every module, interface, class, method, function, and variable in the toolkit. This documentation should be useful to both users and developers. Mailing Lists: There are several mailing lists associated with NLTK: - nltk: Public information and announcements about NLTK (very low volume) http://groups.google.com/group/nltk - nltk-users: Discussions amongst NLTK users http://groups.google.com/group/nltk-users - nltk-dev: Discussions amongst NLTK developers http://groups.google.com/group/nltk-dev - nltk-translation: Discussions about translating the NLTK book http://groups.google.com/group/nltk-translation - nltk-commits: Subversion commit logs for NLTK http://groups.google.com/group/nltk-commitsContributing: If you would like to contribute to NLTK, please see http://www.nltk.org/contributeDonating: Have you found the toolkit helpful? Please support NLTK development by donating to the project via PayPal, using the link on the NLTK homepage.Redistributing: NLTK source code is distributed under the Apache 2.0 License. NLTK documentation is distributed under the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States license. NLTK corpora are provided under the terms given in the README file for each corpus; all are redistributable, and available for non-commercial use. NLTK may be freely redistributed, subject to the provisions of these licenses.Citing: If you publish work that uses NLTK, please cite the NLTK book, as follows: Bird, Steven, Edward Loper and Ewan Klein (2009). Natural Language Processing with Python. O'Reilly Media Inc.