Skin is related to Protection. Protection is a type of Security. 
you are likely to find Theater in/at/on Downtown. you are likely to find Downtown in/at/on City. you are likely to find Supermarket in/at/on City. Supermarket is related to Express. 
Skin <--RelatedTo--> Protection --IsA--> Security 
Theater --AtLocation--> Downtown --AtLocation--> City <--AtLocation-- Supermarket <--RelatedTo--> Express 