<https://www.curtain-stage.com/%e3%82%a6%e3%82%a3%e3%83%aa%e3%82%a2%e3%83%a0%e3%83%a2%e3%83%aa%e3%82%b9%e3%82%ae%e3%83%a3%e3%83%a9%e3%83%aa%e3%83%bc/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.curtain-stage.com/%E3%82%A6%E3%82%A3%E3%83%AA%E3%82%A2%E3%83%A0%E3%83%A2%E3%83%AA%E3%82%B9%E3%82%AE%E3%83%A3%E3%83%A9%E3%83%AA%E3%83%BC/>