<https://paper.hket.com/article/2918828/\u4F01\u696D\u8996\u983B\u6703\u8B70\u6642\u9593%20\u75AB\u4E0B\u98C8\u903E3\u500D>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://paper.hket.com/article/2918828>