<https://www.sdnabc.org/post/\u8FCE\u732A\u5E74-\u8CFD\u5EDA\u85DD>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.sdnabc.org/post/%E8%BF%8E%E7%8C%AA%E5%B9%B4-%E8%B3%BD%E5%BB%9A%E8%97%9D>