Mall is related to Topic. Topic is related to Subject. 
you are likely to find Entrance in/at/on Cave. Entrance is related to Front. Front is related to Lip. Lip is related to Outside. 
Mall <--RelatedTo--> Topic <--RelatedTo--> Subject 
Cave <--AtLocation-- Entrance <--RelatedTo--> Front <--RelatedTo--> Lip <--RelatedTo--> Outside 