<https://atelier-virgo.com/%e3%83%98%e3%83%aa%e3%83%b3%e3%83%9c%e3%83%bc%e3%83%b3%e3%82%b9%e3%83%86%e3%83%83%e3%83%81%e3%81%ae%e3%81%8a%e8%8a%b1/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://atelier-virgo.com/%E3%83%98%E3%83%AA%E3%83%B3%E3%83%9C%E3%83%BC%E3%83%B3%E3%82%B9%E3%83%86%E3%83%83%E3%83%81%E3%81%AE%E3%81%8A%E8%8A%B1/>