<https://notorockyshore.com/2021-4-3%ef%bd%9e%e3%80%80%e4%ba%94%e5%b3%b6%e9%81%a0%e5%be%81/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://notorockyshore.com/2021-4-3%EF%BD%9E%E3%80%80%E4%BA%94%E5%B3%B6%E9%81%A0%E5%BE%81/>