<https://sammieu.pixnet.net/blog/post/29050209-john-fowles%e3%80%88%e7%ac%a6%e5%82%b2%e6%80%9d%e3%80%89%e7%9a%84%e4%ba%8c%e9%83%a8%e4%bd%9c%e5%93%81>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sammieu.pixnet.net/blog/post/29050209>