Heat would make you want to Swim. Swim is related to Competition. Competition is related to Contest. Contest is a synonym of Debate. 
Machine is related to Eye. Eye can be used for Learning. 
Heat --CausesDesire--> Swim <--RelatedTo--> Competition <--RelatedTo--> Contest <--Synonym--> Debate 
Machine <--RelatedTo--> Eye --UsedFor--> Learning 