Associate is related to Blue. Blue is related to Depressed. 
Cooperate is etymologically related to Operate. Fly is a type of Operate. Fly is related to Wall. 
Associate <--RelatedTo--> Blue <--RelatedTo--> Depressed 
Cooperate --EtymologicallyRelatedTo--> Operate <--IsA-- Fly <--RelatedTo--> Wall 