<https://staffblog.jyusetu.com/2020/07/10/%e9%a3%9f%e3%81%84%e3%81%97%e3%82%93%e5%9d%8a/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://staffblog.jyusetu.com/2020/07/10/%E9%A3%9F%E3%81%84%E3%81%97%E3%82%93%E5%9D%8A/>