Form is a type of Document. Add is a type of Form. Add is related to Symbol. Symbol is related to Divide. 
Greek is related to Temple. you are likely to find Temple in/at/on City. you are likely to find Passage in/at/on City. Passage is related to Gate. 
Document <--IsA-- Form <--IsA-- Add <--RelatedTo--> Symbol <--RelatedTo--> Divide 
Greek <--RelatedTo--> Temple --AtLocation--> City <--AtLocation-- Passage <--RelatedTo--> Gate 