<https://taxtoast.com/author/shirai/#author>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://taxtoast.com/2013/12/26/%E5%B9%B4%E6%9C%AB%E8%AA%BF%E6%95%B4%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8B%E5%9B%BD%E6%B0%91%E5%81%A5%E5%BA%B7%E4%BF%9D%E9%99%BA/>