<https://farmtomo.com/%e3%82%ab%e3%83%a9%e3%83%95%e3%83%ab%e3%81%aa%e8%91%89%e7%89%a9%e9%87%8e%e8%8f%9c%e3%81%ae%e5%90%8d%e5%89%8d/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://farmtomo.com/%E3%82%AB%E3%83%A9%E3%83%95%E3%83%AB%E3%81%AA%E8%91%89%E7%89%A9%E9%87%8E%E8%8F%9C%E3%81%AE%E5%90%8D%E5%89%8D/>