<https://and-g.jp/blogs/%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9/george-seven-seas-dog%E3%81%AA%E3%81%A9%E7%8A%AC%E7%94%A8%E5%93%81%E3%81%8C%E5%85%A5%E8%8D%B7%E3%81%97%E3%81%BE%E3%81%97%E3%81%9F>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://and-g.jp/blogs/%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9/george-seven-seas-dog%E3%81%AA%E3%81%A9%E7%8A%AC%E7%94%A8%E5%93%81%E3%81%8C%E5%85%A5%E8%8D%B7%E3%81%97%E3%81%BE%E3%81%97%E3%81%9F>