<https://www.flexible-style.com/single-post/\u30C0\u30A4\u30A8\u30C3\u30C8\u306E\u57FA\u790E\u77E5\u8B58\u301C\u57FA\u790E\u4EE3\u8B1D\u3068\u306F\u301C>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.flexible-style.com/single-post/%E3%83%80%E3%82%A4%E3%82%A8%E3%83%83%E3%83%88%E3%81%AE%E5%9F%BA%E7%A4%8E%E7%9F%A5%E8%AD%98%E3%80%9C%E5%9F%BA%E7%A4%8E%E4%BB%A3%E8%AC%9D%E3%81%A8%E3%81%AF%E3%80%9C>