<https://saku-saku.link/%e6%96%99%e7%90%86%e3%83%bb%e9%a3%9f%e5%93%81/post-2565>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://saku-saku.link/%e6%96%99%e7%90%86%e3%83%bb%e9%a3%9f%e5%93%81/post-2565>