<https://tenmasawa.com/archives/3250/%E6%9D%BE%E5%B0%BE%E5%AF%BA-76/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://tenmasawa.com/archives/3250/%E6%9D%BE%E5%B0%BE%E5%AF%BA-76>