<https://htaiken.org/%e5%88%9d%e4%bd%93%e9%a8%93%e3%81%a7%e3%81%aeh%e4%bd%93%e9%a8%93%e8%ab%87/post-6801.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://htaiken.org/%E5%88%9D%E4%BD%93%E9%A8%93%E3%81%A7%E3%81%AEh%E4%BD%93%E9%A8%93%E8%AB%87/post-6801.html>