<https://yoshioka-sci.com/link/%e7%be%a4%e9%a6%ac%e5%8a%b4%e5%83%8d%e5%b1%80/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://yoshioka-sci.com/link/%E7%BE%A4%E9%A6%AC%E5%8A%B4%E5%83%8D%E5%B1%80/>