<https://chuckorz.pixnet.net/blog/post/64582151-mlb%ef%bc%8f%e7%b5%82%e7%b5%90%e5%a4%aa%e7%a9%ba%e4%ba%ba%ef%bc%9f-%e9%83%ad%e6%b3%93%e5%bf%97%e5%9b%9e%e5%a4%a7%e8%81%af%e7%9b%9f%e6%9c%aa%e4%b8%8a>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://chuckorz.pixnet.net/blog/post/64582151>