Population is related to Large. Large is related to Bear. Bear is related to Fish. Island can be used for Fish. 
Happy is a different concept from Blue. Blue is related to Factory. Factory is related to Production. Production is related to Milk. 
Population <--RelatedTo--> Large <--RelatedTo--> Bear <--RelatedTo--> Fish <--UsedFor-- Island 
Happy <--DistinctFrom--> Blue <--RelatedTo--> Factory <--RelatedTo--> Production <--RelatedTo--> Milk 