Case is related to Edge. Edge is related to Horizon. 
you are likely to find Square in/at/on Town. you are likely to find Road in/at/on Town. Road is related to Average. Average is related to Value. 
Case <--RelatedTo--> Edge <--RelatedTo--> Horizon 
Square --AtLocation--> Town <--AtLocation-- Road <--RelatedTo--> Average <--RelatedTo--> Value 