<https://system-kitchen.net/%e3%83%a1%e3%83%90%e3%83%ab%e3%81%ae%e3%83%95%e3%82%a1%e3%83%ab%e3%82%b7%e3%83%bc/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://system-kitchen.net/%E3%83%A1%E3%83%90%E3%83%AB%E3%81%AE%E3%83%95%E3%82%A1%E3%83%AB%E3%82%B7%E3%83%BC/>