<https://rritz2020.com/#organization>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://rritz2020.com/2021/10/18/10-17-%E9%81%85%E3%82%8C%E3%81%9F%E3%81%91%E3%81%A9%E3%81%8A%E7%A4%BC%E2%99%A1%E7%99%BD%E7%9F%B3/>