Grocery is related to Market. 
Western is a type of Sandwich. you are likely to find Bread in/at/on Sandwich. you are likely to find Bread in/at/on Refrigerator. you are likely to find Jar in/at/on Refrigerator. 
Grocery <--RelatedTo--> Market 
Western --IsA--> Sandwich <--AtLocation-- Bread --AtLocation--> Refrigerator <--AtLocation-- Jar 