Field is related to Goal. Goal is the opposite of Hypothesis. Hypothesis is related to Essay. 
Buyer is the opposite of Merchant. you are likely to find Merchant in/at/on Mall. Mall is related to Suburban. 
Field <--RelatedTo--> Goal <--Antonym--> Hypothesis <--RelatedTo--> Essay 
Buyer <--Antonym--> Merchant --AtLocation--> Mall <--RelatedTo--> Suburban 