<https://pianist-takako.office-tk.jp/2021/04/19/%e3%81%a8%e3%81%8f%e3%81%97%e3%81%be%e8%8a%b8%e8%a1%93%e6%96%87%e5%8c%96%e5%a5%a8%e5%8a%b1%e8%b3%9einterview/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://pianist-takako.office-tk.jp/2021/04/19/%E3%81%A8%E3%81%8F%E3%81%97%E3%81%BE%E8%8A%B8%E8%A1%93%E6%96%87%E5%8C%96%E5%A5%A8%E5%8A%B1%E8%B3%9Einterview/>