<https://www.shijiaok.com/archives/tag/%e7%94%9f%e6%b4%bb%e5%93%b2%e5%ad%a6#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.shijiaok.com/archives/tag/%E7%94%9F%E6%B4%BB%E5%93%B2%E5%AD%A6>