<https://www.daisymarisfung.com/2019/05/09/hkoscon2019-conference-ticket/>
<http://schema.org/name>
"香港開源年會門票開始發售 - Daisy&#039;s Digital Anthology"
<https://www.daisymarisfung.com/2019/05/09/hkoscon2019-conference-ticket/>