<https://bonsai-daijuen.com/2018/11/03/%e3%81%9d%e3%81%aa%e3%82%8c%e3%81%ae%e6%94%b9%e4%bd%9c%e3%80%9c%e9%89%a2%e5%90%88%e3%82%8f%e3%81%9b%e3%81%be%e3%81%a7/img_9778/#itempage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://bonsai-daijuen.com/2018/11/03/%E3%81%9D%E3%81%AA%E3%82%8C%E3%81%AE%E6%94%B9%E4%BD%9C%E3%80%9C%E9%89%A2%E5%90%88%E3%82%8F%E3%81%9B%E3%81%BE%E3%81%A7/img_9778/>