<https://paper.hket.com/article/2946335/\u83EF\u61CB\u65D7\u4E0B\u5546\u5834%20\u5065\u5EB7\u79AE\u5305\u8D08\u5ABD\u5ABD>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://paper.hket.com/article/2946335>