Before revision:  This study also analysed the sentimental dynamics delivered by the hot topics in Twitter such as government policies (e.g. the Australia's JobKeeper program, lock-down , social-distancing) as well as the focused social events (e.g. the Ruby Princess Cruise).
After revision:  This study also analysed the sentimental dynamics delivered by the hot topics in Twitter such as government policies (e.g. the Australia's JobKeeper program, lockdown , social-distancing) as well as the focused social events (e.g. the Ruby Princess Cruise).