Power is related to Smell. Smell is related to Telephone. Extension is a type of Telephone. 
Style is related to Swim. Swim is related to Competition. Weapon can be used for Competition. 
Power <--RelatedTo--> Smell <--RelatedTo--> Telephone <--IsA-- Extension 
Style <--RelatedTo--> Swim <--RelatedTo--> Competition <--UsedFor-- Weapon 