Bug-Database: https://github.com/nltk/nltk/issues
Bug-Submit: https://github.com/nltk/nltk/issues/new
Reference:
  Author: Steven Bird and Ewan Klein and Edward Loper
  Booktitle: Natural Language Processing with Python
  Year: 2009
  ISBN: 0596516495 9780596516499
  Publisher: "O'Reilly Media, Inc."
Repository: https://github.com/nltk/nltk.git
Repository-Browse: https://github.com/nltk/nltk
