<https://www.koho-nishiki.com/2022/07/15/%e4%ba%a5%e6%b0%b4%e6%96%87%e3%80%80%e9%bb%84%e7%b7%91%e3%80%80%e5%8f%a4%e5%b8%9b%e7%b4%97-2/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.koho-nishiki.com/2022/07/15/%E4%BA%A5%E6%B0%B4%E6%96%87%E3%80%80%E9%BB%84%E7%B7%91%E3%80%80%E5%8F%A4%E5%B8%9B%E7%B4%97-2/>