<https://taki-honten.com/#articleImage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://taki-honten.com/blog/%E5%88%88%E8%B0%B7%E3%83%8F%E3%82%A4%E3%82%A6%E3%82%A7%E3%82%A4%E3%82%AA%E3%82%A2%E3%82%B7%E3%82%B9/>