<https://tack-roll.com/author/tack-oomura/#author>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://tack-roll.com/blog/%E3%82%A4%E3%83%99%E3%83%B3%E3%83%88%E9%80%9F%E5%A0%B1%EF%BC%81%EF%BC%81-46/>