<https://blog.kozakanaya.com/2017/06/28/%e5%8c%97%e6%b5%b7%e9%81%93%e9%87%a3%e8%a1%8c2017%e5%a4%8f%e3%83%bb%ef%bc%92%e6%97%a5%e7%9b%ae/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://blog.kozakanaya.com/2017/06/28/%E5%8C%97%E6%B5%B7%E9%81%93%E9%87%A3%E8%A1%8C2017%E5%A4%8F%E3%83%BB%EF%BC%92%E6%97%A5%E7%9B%AE/>