<https://shidarapress.com/2016/11/17/%e3%82%aa%e3%83%87%e3%83%a5%e3%83%83%e3%82%bb%e3%82%a4%e3%82%a2%ef%bc%9a%e7%8e%8b%e3%81%ae%e9%81%8d%e6%ad%b4/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://shidarapress.com/2016/11/17/%E3%82%AA%E3%83%87%E3%83%A5%E3%83%83%E3%82%BB%E3%82%A4%E3%82%A2%EF%BC%9A%E7%8E%8B%E3%81%AE%E9%81%8D%E6%AD%B4/>