<https://bellecouleur.net/2019/06/09/%e7%b3%b8%e6%9b%bc%e8%8d%bc%e7%be%85/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://bellecouleur.net/2019/06/09/%E7%B3%B8%E6%9B%BC%E8%8D%BC%E7%BE%85/>