<https://one-100blog.com/tag/%e3%82%b2%e3%83%bc%e3%83%9f%e3%83%b3%e3%82%b0%e7%b3%bb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://one-100blog.com/tag/%E3%82%B2%E3%83%BC%E3%83%9F%E3%83%B3%E3%82%B0%E7%B3%BB>