you are likely to find Snow in/at/on Roof. Roof is a type of Single. Single is related to Bill. Bill is related to Utility. 
Street is related to Location. Northeast is a type of Location. 
Snow --AtLocation--> Roof --IsA--> Single <--RelatedTo--> Bill <--RelatedTo--> Utility 
Street <--RelatedTo--> Location <--IsA-- Northeast 