<https://uncle-kanma.blog/%e4%bd%95%e3%81%8b%e3%81%ae%e5%be%a1%e7%b8%81/#articleImage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://uncle-kanma.blog/%E4%BD%95%E3%81%8B%E3%81%AE%E5%BE%A1%E7%B8%81/>