<https://satsukingooo.main.jp/blog/%e6%9c%89%e5%90%8d%e3%81%aa%e6%9b%b2/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://satsukingooo.main.jp/blog/%E6%9C%89%E5%90%8D%E3%81%AA%E6%9B%B2/>