<https://marea-oki.jp/blog/fun-diving/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://marea-oki.jp/blog/fun-diving/2021%E5%B9%B4%E3%83%A9%E3%82%B9%E3%83%88%E3%82%B9%E3%83%91%E3%83%BC%E3%83%88%EF%BC%81%EF%BC%81/>