Reduce is the opposite of Weight. Weight is related to Exercise. Exercise is a type of Effort. Success requires Effort. 
Fruit can be used for Eating. Eating is related to Cookie. Cookie is related to Kid. 
Reduce <--Antonym--> Weight <--RelatedTo--> Exercise --IsA--> Effort <--HasPrerequisite-- Success 
Fruit --UsedFor--> Eating <--RelatedTo--> Cookie <--RelatedTo--> Kid 