<https://info.noto-highschool.com/2020/09/15/%e3%82%84%e3%81%99%e3%82%89%e3%81%8e%e4%be%bf%e3%82%8a%e3%82%92%e3%82%a2%e3%83%83%e3%83%97%e3%81%97%e3%81%be%e3%81%97%e3%81%9f%ef%bc%81/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://info.noto-highschool.com/2020/09/15/%E3%82%84%E3%81%99%E3%82%89%E3%81%8E%E4%BE%BF%E3%82%8A%E3%82%92%E3%82%A2%E3%83%83%E3%83%97%E3%81%97%E3%81%BE%E3%81%97%E3%81%9F%EF%BC%81/>