<https://midorikimonokyoushitu.com/2023/08/24/%e3%81%8a%e4%b9%85%e3%81%97%e3%81%b6%e3%82%8a%e3%81%a7%ef%bd%9e%e3%81%99%e2%99%aa/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://midorikimonokyoushitu.com/2023/08/24/%E3%81%8A%E4%B9%85%E3%81%97%E3%81%B6%E3%82%8A%E3%81%A7%EF%BD%9E%E3%81%99%E2%99%AA/>