<https://ronso.co.jp/book/%e6%b1%a0%e7%94%b0%e9%be%8d%e9%9b%84%e3%81%ae%e7%99%ba%e8%a8%80/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ronso.co.jp/book/%E6%B1%A0%E7%94%B0%E9%BE%8D%E9%9B%84%E3%81%AE%E7%99%BA%E8%A8%80/>