<https://sevenss.org/%e4%bd%a0%e7%9f%a5%e9%81%93%e4%b8%80%e5%a4%a9%e6%89%80%e9%9c%80%e7%9a%84%e6%b0%b4%e5%88%86%e5%92%8c%e6%b0%b4%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7%e5%97%8e%ef%bc%9f/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sevenss.org/health/>