<https://torisky.com/%e5%a5%b3%e6%80%a7%e5%b0%82%e7%94%a8%e8%bb%8a%e3%81%ae%e6%80%aa/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://torisky.com/%E5%A5%B3%E6%80%A7%E5%B0%82%E7%94%A8%E8%BB%8A%E3%81%AE%E6%80%AA/>