Letter is related to Card. Card is related to Flat. Flat is related to Wall. Wall is a type of Boundary. 
you are likely to find Gold in/at/on Church. you are likely to find Human in/at/on Church. Jew is a type of Human. 
Letter <--RelatedTo--> Card <--RelatedTo--> Flat <--RelatedTo--> Wall --IsA--> Boundary 
Gold --AtLocation--> Church <--AtLocation-- Human <--IsA-- Jew 