you are likely to find Program in/at/on Theater. you are likely to find Door in/at/on Theater. you are likely to find Door in/at/on Room. Toilet is a type of Room. 
you are likely to find Human in/at/on Love. Human is related to Memory. 
Program --AtLocation--> Theater <--AtLocation-- Door --AtLocation--> Room <--IsA-- Toilet 
Love <--AtLocation-- Human <--RelatedTo--> Memory 