id	keyword
gc-361	exploration
gc-361	oil
gc-361	production
gc-361	gas
gc-361	reserves
gc-361	number
gc-361	table
gc-361	area
gc-361	fields
gc-361	year
gc-361	efficiency
gc-361	costs
gc-361	increase
gc-361	world
gc-361	croatia
gc-361	price