<https://bigitoh.net/author/donchan/#author>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://bigitoh.net/2019/10/22/%E9%98%B2%E5%AF%92%E3%82%B3%E3%83%BC%E3%83%88%E3%82%92%E8%B2%B7%E3%81%A3%E3%81%9F/>