<https://samuraieddy.com/%e8%87%aa%e8%bb%a2%e8%bb%8a%e9%9b%a2%e3%82%8c%e3%81%ae%e6%97%a5%e3%80%85/img_8769>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://samuraieddy.com/%E8%87%AA%E8%BB%A2%E8%BB%8A%E9%9B%A2%E3%82%8C%E3%81%AE%E6%97%A5%E3%80%85/img_8769>