_:n93109def0284451a8914ec7f1d686ed3xb1
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ysk-pro.hatenablog.com/archive/category/%E3%83%87%E3%82%B6%E3%82%A4%E3%83%B3%E3%83%91%E3%82%BF%E3%83%BC%E3%83%B3>