<https://jiyukenkyu-online.s-goodidea.jp/2024/08/08/otsumatama/%e3%82%bf%e3%82%a4%e3%83%88%e3%83%ab/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://jiyukenkyu-online.s-goodidea.jp/2024/08/08/otsumatama/%E3%82%BF%E3%82%A4%E3%83%88%E3%83%AB/>