Elementary is related to School. you are likely to find Gym in/at/on School. you are likely to find Towel in/at/on Gym. you are likely to find Towel in/at/on Closet. 
Middle is related to Peace. 
Elementary <--RelatedTo--> School <--AtLocation-- Gym <--AtLocation-- Towel --AtLocation--> Closet 
Middle <--RelatedTo--> Peace 