<https://yashizaru.com/%e3%80%90%e8%99%b9%e3%81%ae%e6%9d%be%e5%8e%9f%e3%80%91in%e4%bd%90%e8%b3%806>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://yashizaru.com/%E3%80%90%E8%99%B9%E3%81%AE%E6%9D%BE%E5%8E%9F%E3%80%91in%E4%BD%90%E8%B3%806>