<https://risuken-kse.com/2022/03/07/2022%e3%80%80%e5%80%8b%e5%88%a5%e8%ac%9b%e5%ba%a7%e3%81%ae%e3%81%8a%e7%9f%a5%e3%82%89%e3%81%9b/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://risuken-kse.com/2022/03/07/2022%E3%80%80%E5%80%8B%E5%88%A5%E8%AC%9B%E5%BA%A7%E3%81%AE%E3%81%8A%E7%9F%A5%E3%82%89%E3%81%9B/>