<https://www.yakitori-midori.info/post/\u305A\u308A-\u7802\u809D-\u3068\u3057\u3093\u305E\u3046-\u3053\u3053\u308D>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.yakitori-midori.info/post/%E3%81%9A%E3%82%8A-%E7%A0%82%E8%82%9D-%E3%81%A8%E3%81%97%E3%82%93%E3%81%9E%E3%81%86-%E3%81%93%E3%81%93%E3%82%8D>