<https://masuminosato.jp/news/%e3%83%9f%e3%83%8b%e9%81%8b%e5%8b%95%e4%bc%9a/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://masuminosato.jp/news/%E3%83%9F%E3%83%8B%E9%81%8B%E5%8B%95%E4%BC%9A/>