id	keyword
easat-10914	energy
easat-10914	gas
easat-10914	oil
easat-10914	vol
easat-10914	index
easat-10914	production
easat-10914	supply
easat-10914	price
easat-10914	consumption
easat-10914	risk
easat-10914	authors
easat-10914	european