<https://f-mirai.jp/archives/tag/%e4%bc%8a%e8%97%a4%e3%81%84%e3%81%a5%e3%81%bf#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://f-mirai.jp/archives/tag/%E4%BC%8A%E8%97%A4%E3%81%84%E3%81%A5%E3%81%BF>