<https://community-h.com/2021%e5%b9%b4-10%e6%9c%88-%e3%83%8f%e3%83%ad%e3%82%a6%e3%82%a3%e3%83%b3%e5%88%b6%e4%bd%9c/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://community-h.com/2021%E5%B9%B4-10%E6%9C%88-%E3%83%8F%E3%83%AD%E3%82%A6%E3%82%A3%E3%83%B3%E5%88%B6%E4%BD%9C/>