<https://www.tram-arakawa.org/single-post/\u30EA\u30AB\u30D0\u30EA\u2015\u7814\u7A76\u4F1A>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.tram-arakawa.org/single-post/%E3%83%AA%E3%82%AB%E3%83%90%E3%83%AA%E2%80%95%E7%A0%94%E7%A9%B6%E4%BC%9A>