<https://www.mirengijuku.com/post/\u73FE\u5C0F\u4E2D\u5B66\u751F\u306F-\u3084\u3063\u3066\u304A\u304F\u3068\u826F\u3044-5\u3064\u306E\u3053\u3068>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.mirengijuku.com/post/%E7%8F%BE%E5%B0%8F%E4%B8%AD%E5%AD%A6%E7%94%9F%E3%81%AF-%E3%82%84%E3%81%A3%E3%81%A6%E3%81%8A%E3%81%8F%E3%81%A8%E8%89%AF%E3%81%84-5%E3%81%A4%E3%81%AE%E3%81%93%E3%81%A8>