Stage is related to Room. Room is related to Fan. Fan is related to Reading. Reading is related to Intellectual. 
Marble is related to Eye. you are likely to find Eye in/at/on Potato. 
Stage <--RelatedTo--> Room <--RelatedTo--> Fan <--RelatedTo--> Reading <--RelatedTo--> Intellectual 
Marble <--RelatedTo--> Eye --AtLocation--> Potato 