<https://www.kokostajyuku.com/2021/03/27/%e6%98%a5%e6%9c%9f%e8%ac%9b%e7%bf%92%e3%81%bf%e3%82%93%e3%81%aa%e3%81%a7%e3%81%8c%e3%82%93%e3%81%b0%e3%81%a3%e3%81%a6%e3%81%84%e3%81%be%e3%81%99%ef%bc%81/img_0251/#item>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
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