<https://ag-awaji.com/2023/07/16/7%e6%9c%8816%e6%97%a5%e3%80%80%e3%83%a1%e3%83%83%e3%82%bb%e3%83%bc%e3%82%b8%e8%a6%81%e7%b4%84-2/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ag-awaji.com/2023/07/16/7%E6%9C%8816%E6%97%A5%E3%80%80%E3%83%A1%E3%83%83%E3%82%BB%E3%83%BC%E3%82%B8%E8%A6%81%E7%B4%84-2/>