id	keyword
aiti-11743	model
aiti-11743	covid-19
aiti-11743	vol
aiti-11743	bert
aiti-11743	tweets
aiti-11743	learning
aiti-11743	research
aiti-11743	data
aiti-11743	sentiment
aiti-11743	analysis
aiti-11743	pre
aiti-11743	dataset
aiti-11743	classification
aiti-11743	article