Pass is a synonym of Road. you are likely to find Bus in/at/on Road. 
Southwest is a type of Airline. Airline is a type of Business. you are likely to find Merchant in/at/on Business. Merchant is related to Store. 
Pass <--Synonym--> Road <--AtLocation-- Bus 
Southwest --IsA--> Airline --IsA--> Business <--AtLocation-- Merchant <--RelatedTo--> Store 