<https://buraunkantvblog.com/%e3%82%a2%e3%83%83%e3%82%b7%e3%83%a5%e3%82%b0%e3%83%ac%e3%82%a4%e3%80%90%e5%a4%a7%e6%b3%89%e5%ad%a6%e5%9c%92%e3%80%91/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://buraunkantvblog.com/%E3%82%A2%E3%83%83%E3%82%B7%E3%83%A5%E3%82%B0%E3%83%AC%E3%82%A4%E3%80%90%E5%A4%A7%E6%B3%89%E5%AD%A6%E5%9C%92%E3%80%91/>