<https://mj-0524-channel.com/%e7%af%80%e7%a8%8e%e3%81%97%e3%81%a6%e3%81%84%e3%81%be%e3%81%99%e3%81%8b%ef%bc%9f/#blogposting>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://mj-0524-channel.com/%E7%AF%80%E7%A8%8E%E3%81%97%E3%81%A6%E3%81%84%E3%81%BE%E3%81%99%E3%81%8B%EF%BC%9F/>