you are likely to find World in/at/on Galaxy. World is related to Sea. Bay is part of Sea. Bay is part of Ship. 
Campus is related to College. College is related to American. American is related to Base. Base is part of Lamp. 
Galaxy <--AtLocation-- World <--RelatedTo--> Sea <--PartOf-- Bay --PartOf--> Ship 
Campus <--RelatedTo--> College <--RelatedTo--> American <--RelatedTo--> Base --PartOf--> Lamp 