<https://www.m-alfahd.com/2011/03/21/%e9%9b%a8%e3%81%ae%e6%97%a5%e3%81%af/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.m-alfahd.com/2011/03/21/%E9%9B%A8%E3%81%AE%E6%97%A5%E3%81%AF/>