Farm is related to Cow. Cow is related to Barn. you are likely to find Hay in/at/on Barn. Hay is related to Dried. 
you are likely to find Snake in/at/on Bedroom. 
Farm <--RelatedTo--> Cow <--RelatedTo--> Barn <--AtLocation-- Hay <--RelatedTo--> Dried 
Snake --AtLocation--> Bedroom 