id	keyword
arees-1311	groundwater
arees-1311	samples
arees-1311	study
arees-1311	area
arees-1311	arsenic
arees-1311	saline
arees-1311	vol
arees-1311	concentration
arees-1311	table
arees-1311	journal
arees-1311	mean
arees-1311	asian
arees-1311	drinking