<https://gold.scatikuiku.com/2021/10/12/%e4%ba%ba%e5%a6%bb%e3%83%87%e3%83%aa%e3%83%90%e3%83%aa%e3%83%bc%e3%81%86%e3%82%93%e3%81%93/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://gold.scatikuiku.com/2021/10/12/%E4%BA%BA%E5%A6%BB%E3%83%87%E3%83%AA%E3%83%90%E3%83%AA%E3%83%BC%E3%81%86%E3%82%93%E3%81%93/>