Unable is the opposite of Can. Drum is a type of Can. 
Age is related to Value. Value is a synonym of Advantage. Advantage is a synonym of Favor. Favor is a synonym of Prefer. 
Unable <--Antonym--> Can <--IsA-- Drum 
Age <--RelatedTo--> Value <--Synonym--> Advantage <--Synonym--> Favor <--Synonym--> Prefer 