<https://clh.jp/%e6%9e%95%e3%81%ab%e4%b8%80%e7%9b%ae%e3%81%bc%e3%82%8c/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://clh.jp/%E6%9E%95%E3%81%AB%E4%B8%80%E7%9B%AE%E3%81%BC%E3%82%8C/>