<https://g-rockets-studio.com/news/%e4%bc%91%e8%ac%9b%ef%bc%88%e3%82%a2%e3%82%af%e3%83%ad%e3%83%90%e3%83%83%e3%83%88%e3%83%80%e3%83%b3%e3%82%b9%e4%b8%ad%e7%b4%9a6-6%e5%9c%9f%ef%bc%89/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://g-rockets-studio.com/news/%E4%BC%91%E8%AC%9B%EF%BC%88%E3%82%A2%E3%82%AF%E3%83%AD%E3%83%90%E3%83%83%E3%83%88%E3%83%80%E3%83%B3%E3%82%B9%E4%B8%AD%E7%B4%9A6-6%E5%9C%9F%EF%BC%89/>