/usr/ is in ruby-classifier 1.3.3-1.
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..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/lib/ruby/vendor_ruby/classifier.rb
/usr/lib/ruby/vendor_ruby/classifier/
/usr/lib/ruby/vendor_ruby/classifier/bayes.rb
/usr/lib/ruby/vendor_ruby/classifier/lsi/
/usr/lib/ruby/vendor_ruby/classifier/lsi/content_node.rb
/usr/lib/ruby/vendor_ruby/classifier/lsi/summary.rb
/usr/lib/ruby/vendor_ruby/classifier/lsi/word_list.rb
/usr/lib/ruby/vendor_ruby/classifier/extensions/
/usr/lib/ruby/vendor_ruby/classifier/extensions/word_hash.rb
/usr/lib/ruby/vendor_ruby/classifier/extensions/vector_serialize.rb
/usr/lib/ruby/vendor_ruby/classifier/extensions/vector.rb
/usr/lib/ruby/vendor_ruby/classifier/extensions/string.rb
/usr/lib/ruby/vendor_ruby/classifier/lsi.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.8/
/usr/share/rubygems-integration/1.8/specifications/
/usr/share/rubygems-integration/1.8/specifications/classifier-1.3.3.gemspec
/usr/share/rubygems-integration/1.9.1/specifications/classifier-1.3.3.gemspec
/usr/share/doc/
/usr/share/doc/ruby-classifier/
/usr/share/doc/ruby-classifier/README.Debian
/usr/share/doc/ruby-classifier/examples/
/usr/share/doc/ruby-classifier/examples/bayes.rb
/usr/share/doc/ruby-classifier/examples/summarize.rb
/usr/share/doc/ruby-classifier/copyright
/usr/share/doc/ruby-classifier/README
/usr/share/doc/ruby-classifier/changelog.Debian.gz