<https://www.kanpo-u-bido-kobe.com/2015/02/16/%e3%83%90%e3%82%a4%e3%82%aa%e3%83%aa%e3%83%b3%e3%82%af%e3%81%ae%e5%8b%89%e5%bc%b7%e4%bc%9a/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.kanpo-u-bido-kobe.com/2015/02/16/%E3%83%90%E3%82%A4%E3%82%AA%E3%83%AA%E3%83%B3%E3%82%AF%E3%81%AE%E5%8B%89%E5%BC%B7%E4%BC%9A/>