<https://netofuli.com/tag/%e6%a2%a8%e6%b3%b0%e9%99%a2%e3%82%af%e3%83%a9%e3%82%b9/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://netofuli.com/tag/%E6%A2%A8%E6%B3%B0%E9%99%A2%E3%82%AF%E3%83%A9%E3%82%B9/>