<https://onbehalf.jp/2021/07/14/\u30B7\u30EB\u30AF\u535A\u7269\u9928-7/#website>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://onbehalf.jp/2021/07/14/%E3%82%B7%E3%83%AB%E3%82%AF%E5%8D%9A%E7%89%A9%E9%A4%A8-7/>