<https://system-kitchen.net/%e3%83%9d%e3%83%b3%e3%83%bb%e3%83%87%e3%83%bb%e3%82%b1%e3%83%bc%e3%82%b8%e3%83%a7/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://system-kitchen.net/%E3%83%9D%E3%83%B3%E3%83%BB%E3%83%87%E3%83%BB%E3%82%B1%E3%83%BC%E3%82%B8%E3%83%A7/>