you are likely to find Processor in/at/on Computer. 
you are likely to find Refrigerator in/at/on Apartment. you are likely to find Pie in/at/on Refrigerator. Pie is related to Dessert. Dessert is related to Chocolate. 
Computer <--AtLocation-- Processor 
Apartment <--AtLocation-- Refrigerator <--AtLocation-- Pie <--RelatedTo--> Dessert <--RelatedTo--> Chocolate 