id	keyword
hssr-50	state
hssr-50	saudi
hssr-50	oil
hssr-50	arabia
hssr-50	incomes
hssr-50	democracy
hssr-50	government
hssr-50	countries
hssr-50	system
hssr-50	resources
hssr-50	middle
hssr-50	society
hssr-50	structure
hssr-50	rent
hssr-50	science