Hallway is related to Narrow. Narrow is the opposite of Deep. Deep is related to Pool. 
Peasant is a type of Worker. Peasant is the opposite of Citizen. Civilian is a type of Citizen. 
Hallway <--RelatedTo--> Narrow <--Antonym--> Deep <--RelatedTo--> Pool 
Worker <--IsA-- Peasant <--Antonym--> Citizen <--IsA-- Civilian 