<https://gionkonishi.com/2018/06/23/%e5%a5%88%e8%89%af%e5%b9%b3%e5%ae%a3%e5%ad%90-2/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://gionkonishi.com/2018/06/23/%E5%A5%88%E8%89%AF%E5%B9%B3%E5%AE%A3%E5%AD%90-2/>