/usr/share/doc/python-stemmer-doc/html/ is in python-stemmer-doc 1.3.0+dfsg-1.
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/usr/share/doc/python-stemmer-doc/html/api/
/usr/share/doc/python-stemmer-doc/html/api/Stemmer-module.html
/usr/share/doc/python-stemmer-doc/html/api/Stemmer.Stemmer-class.html
/usr/share/doc/python-stemmer-doc/html/api/api-objects.txt
/usr/share/doc/python-stemmer-doc/html/api/class-tree.html
/usr/share/doc/python-stemmer-doc/html/api/crarr.png
/usr/share/doc/python-stemmer-doc/html/api/epydoc.css
/usr/share/doc/python-stemmer-doc/html/api/epydoc.js
/usr/share/doc/python-stemmer-doc/html/api/frames.html
/usr/share/doc/python-stemmer-doc/html/api/help.html
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/usr/share/doc/python-stemmer-doc/html/api/toc-everything.html
/usr/share/doc/python-stemmer-doc/html/api/toc.html