<https://www.kennethkwok.me/blog/2016/02/12/%e5%a4%a7%e8%bc%b8%e5%ae%b6/#richSnippet>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.kennethkwok.me/blog/2016/02/12/%E5%A4%A7%E8%BC%B8%E5%AE%B6/>