<https://carol218.com/tag/%e8%98%ad%e6%bd%ad%e6%9c%88%e5%bd%b1%e6%bd%ad%e5%bf%83>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://carol218.com/archives/tag/%E8%98%AD%E6%BD%AD%E6%9C%88%E5%BD%B1%E6%BD%AD%E5%BF%83>