<https://kanimiso-burogu.com/2021/02/11/%e3%81%93%e3%81%84%e3%81%a4%e3%82%82%e6%a3%92%e3%81%a7%e5%8f%a9%e3%81%84%e3%81%a6%e3%81%84%e3%81%84/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://kanimiso-burogu.com/2021/02/11/%E3%81%93%E3%81%84%E3%81%A4%E3%82%82%E6%A3%92%E3%81%A7%E5%8F%A9%E3%81%84%E3%81%A6%E3%81%84%E3%81%84/>