.. Footer to be used in all chapters

.. admonition:: About this document...

   This chapter is a draft from
   *Introduction to Natural Language Processing*, by
   |StevenBird|, |EwanKlein| and |EdwardLoper|,
   Copyright |copy| 2007 the authors.
   It is distributed with the *Natural Language Toolkit* [|NLTK-URL|],
   Version |version|, under the terms of the
   *Creative Commons Attribution-ShareAlike License*
   [http://creativecommons.org/licenses/by-sa/2.5/].
 
   .. include:: revision.txt

