<https://machicon-koikatsu.com/%e5%a4%a9%e7%a5%9e-%e3%83%9e%e3%83%83%e3%83%81%e3%83%b3%e3%82%b0%e3%82%a2%e3%83%97%e3%83%aa/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://machicon-koikatsu.com/%E5%A4%A9%E7%A5%9E-%E3%83%9E%E3%83%83%E3%83%81%E3%83%B3%E3%82%B0%E3%82%A2%E3%83%97%E3%83%AA/>