Part is related to Week. 
you are likely to find Laboratory in/at/on University. you are likely to find Sink in/at/on Laboratory. you are likely to find Sink in/at/on Apartment. Apartment is related to Suite. 
Part <--RelatedTo--> Week 
University <--AtLocation-- Laboratory <--AtLocation-- Sink --AtLocation--> Apartment <--RelatedTo--> Suite 