<https://www.kusakouji.com/post/\u65E5\u66DC\u65E5\u3082\u958B\u5E97\u4E88\u5B9A>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.kusakouji.com/post/%E6%97%A5%E6%9B%9C%E6%97%A5%E3%82%82%E9%96%8B%E5%BA%97%E4%BA%88%E5%AE%9A>