<https://chokyo-keiba.net/2012/2012-%e4%b8%83%e5%a4%95%e8%b3%9e%ef%bc%86%e3%83%97%e3%83%ad%e3%82%ad%e3%82%aa%e3%83%b3%e3%82%b9%e3%83%86%e3%83%bc%e3%82%af%e3%82%b9/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://chokyo-keiba.net/2012/2012-%E4%B8%83%E5%A4%95%E8%B3%9E%EF%BC%86%E3%83%97%E3%83%AD%E3%82%AD%E3%82%AA%E3%83%B3%E3%82%B9%E3%83%86%E3%83%BC%E3%82%AF%E3%82%B9/>