<https://www.suzueikinzoku.com/post/2\u6708\u9285\u76F8\u5834\uFF01>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.suzueikinzoku.com/post/2%E6%9C%88%E9%8A%85%E7%9B%B8%E5%A0%B4%EF%BC%81>