<https://bbs47.net/kanagawa/%e7%a5%9e%e5%a5%88%e5%b7%9d%e7%9c%8c%e8%b6%b3%e6%9f%84%e4%b8%8a%e9%83%a1%e6%9d%be%e7%94%b0%e7%94%ba>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://bbs47.net/kanagawa/%E7%A5%9E%E5%A5%88%E5%B7%9D%E7%9C%8C%E8%B6%B3%E6%9F%84%E4%B8%8A%E9%83%A1%E6%9D%BE%E7%94%B0%E7%94%BA>