<https://tipaa.org/%e3%80%90%e5%9c%8b%e6%83%85%e5%bd%b1%e7%89%87-%e7%be%8e%e9%ba%97%e5%8f%b0%e7%81%a3%e3%80%91/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://tipaa.org/%E3%80%90%E5%9C%8B%E6%83%85%E5%BD%B1%E7%89%87-%E7%BE%8E%E9%BA%97%E5%8F%B0%E7%81%A3%E3%80%91/>