<https://www.sanwasekkei.co.jp/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.sanwasekkei.co.jp/reform/%E4%B8%89%E6%A1%9C%E5%B7%A5%E6%A5%AD%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE%E6%A7%98>