Curve is a type of Pitch. Pitch is a synonym of Deliver. Deliver is related to Guy. 
Beer is related to Barrel. Barrel is related to Oil. Oil is related to Essence. Essence is a type of Substance. 
Curve --IsA--> Pitch <--Synonym--> Deliver <--RelatedTo--> Guy 
Beer <--RelatedTo--> Barrel <--RelatedTo--> Oil <--RelatedTo--> Essence --IsA--> Substance 