Perfect is related to Plan. Plan is related to Master. Master is a type of Creation. 
Royal is related to Palace. Palace is related to Shelter. Apartment can be used for Shelter. you are likely to find Mouse in/at/on Apartment. 
Perfect <--RelatedTo--> Plan <--RelatedTo--> Master --IsA--> Creation 
Royal <--RelatedTo--> Palace <--RelatedTo--> Shelter <--UsedFor-- Apartment <--AtLocation-- Mouse 