Eat is related to Banana. Banana is a type of Food. Food is related to Carrot. 
Intelligent is the opposite of Smart. Smart is similar to Automatic. Auto is etymologically related to Automatic. Auto is related to Drive. 
Eat <--RelatedTo--> Banana --IsA--> Food <--RelatedTo--> Carrot 
Intelligent <--Antonym--> Smart <--SimilarTo--> Automatic <--EtymologicallyRelatedTo-- Auto <--RelatedTo--> Drive 