id	keyword
cet-13687	energy
cet-13687	cost
cet-13687	system
cet-13687	multi
cet-13687	companies
cet-13687	trading
cet-13687	p2p
cet-13687	utility
cet-13687	cooperative
cet-13687	coalition
cet-13687	company
cet-13687	model