<https://www.dewanoumi.net/topics/2023/03/%e5%b1%b1%e7%94%b0%e6%b5%b7-2023%e5%b9%b4%e4%ba%94%e6%9c%88%e5%a0%b4%e6%89%80%e6%8a%b1%e8%b2%a0-2/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.dewanoumi.net/topics/2023/03/%e5%b1%b1%e7%94%b0%e6%b5%b7-2023%e5%b9%b4%e4%ba%94%e6%9c%88%e5%a0%b4%e6%89%80%e6%8a%b1%e8%b2%a0-2/>