<https://bigitoh.net/author/donchan/#author>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://bigitoh.net/2020/01/22/%E4%BD%95%E3%81%A8%E3%81%AA%E3%81%8F%E8%AA%BF%E5%AD%90%E3%81%8C%E6%82%AA%E3%81%84/>