<https://amybrewervb.pixnet.net/blog/post/219774385-%e8%98%86%e7%ab%b9%e6%88%bf%e5%b1%8b%e5%80%9f%e9%8c%a2-%e5%8d%97%e5%b4%81%e6%88%bf%e5%b1%8b%e5%80%9f%e9%8c%a2-%e7%95%b6%e6%97%a5%e6%92%a5%e6%ac%be-097369908>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://amybrewervb.pixnet.net/blog/post/219774385-%E8%98%86%E7%AB%B9%E6%88%BF%E5%B1%8B%E5%80%9F%E9%8C%A2-%E5%8D%97%E5%B4%81%E6%88%BF%E5%B1%8B%E5%80%9F%E9%8C%A2-%E7%95%B6%E6%97%A5%E6%92%A5%E6%AC%BE-097369908>