Side is related to War. you are likely to find Pistol in/at/on War. Pistol is a type of Weapon. Tank is a type of Weapon. 
Door is related to Escape. Escape is related to Left. Left is related to Punch. Punch is related to Painful. 
Side <--RelatedTo--> War <--AtLocation-- Pistol --IsA--> Weapon <--IsA-- Tank 
Door <--RelatedTo--> Escape <--RelatedTo--> Left <--RelatedTo--> Punch <--RelatedTo--> Painful 