<https://sevenss.org/%e6%89%8b%e4%b8%8a%e9%9d%92%e7%ad%8b%e8%b6%8a%e5%a4%9a%ef%bc%8c%e8%af%b4%e6%98%8e%e8%ba%ab%e4%bd%93%e8%b6%8a/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sevenss.org/health/>