<https://0556s.com/%e3%82%b7%e3%83%a7%e3%82%a6%e3%82%ac%e3%81%ae%e5%8a%b9%e8%83%bd/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://0556s.com/%E3%82%B7%E3%83%A7%E3%82%A6%E3%82%AC%E3%81%AE%E5%8A%B9%E8%83%BD/>