<https://melody.flowers/blog/post/351256228-bio-charm-%e8%98%8a%e4%bf%8f%e5%9d%8a-%e7%84%a1%e6%b7%bb%e5%8a%a0%e7%b3%bb%e5%88%97%e3%80%82%e5%a4%a7%e9%a6%ac%e5%a3%ab%e9%9d%a9%e7%8e%ab%e7%91%b0%e7%b2%be>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://melody.flowers/blog/post/351256228>