<https://www.seoultravelpass.com/zh-CN/products/1012-wifi-lgu-wifi-%E7%A7%9F%E8%B5%81>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.seoultravelpass.com/zh-CN/products/1012-wifi-lgu-wifi-%E7%A7%9F%E8%B5%81>