<http://syouikusya.com/staffblog/4110/a5495258-78ab-46a1-b129-8782c3da0e16/#itempage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://syouikusya.com/staffblog/4110/a5495258-78ab-46a1-b129-8782c3da0e16/>