<https://bri-future777.com/archives/4617/%e3%82%b9%e3%82%af%e3%83%aa%e3%83%bc%e3%83%b3%e3%82%b7%e3%83%a7%e3%83%83%e3%83%88-2017-12-27-16-07-08>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://bri-future777.com/archives/4617/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2017-12-27-16-07-08>