<https://shisei-reform.com/voice/%e5%b0%be%e3%81%a6%e3%81%84%e9%aa%a8%e3%81%ae%e7%97%9b%e3%81%bf%e3%81%8c%e3%81%b2%e3%81%a9%e3%81%8f/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://shisei-reform.com/voice/%E5%B0%BE%E3%81%A6%E3%81%84%E9%AA%A8%E3%81%AE%E7%97%9B%E3%81%BF%E3%81%8C%E3%81%B2%E3%81%A9%E3%81%8F/>