<https://uniq-style.net/blog/archives/tag/%E3%83%9C%E3%83%AC%E3%83%BC/#collectionpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://uniq-style.net/blog/archives/tag/%E3%83%9C%E3%83%AC%E3%83%BC>