<https://www.demi-reve.com/post/\u30EF\u30FC\u30AF\u30B7\u30E7\u30C3\u30D7\u306E\u304A\u77E5\u3089\u305B-1>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.demi-reve.com/post/%E3%83%AF%E3%83%BC%E3%82%AF%E3%82%B7%E3%83%A7%E3%83%83%E3%83%97%E3%81%AE%E3%81%8A%E7%9F%A5%E3%82%89%E3%81%9B-1>