Thin is related to Sheet. Sheet is related to Leaf. Lobby is etymologically related to Leaf. 
Citizen is the opposite of Immigrant. Immigrant is a type of Person. Person can Taste. 
Thin <--RelatedTo--> Sheet <--RelatedTo--> Leaf <--EtymologicallyRelatedTo-- Lobby 
Citizen <--Antonym--> Immigrant --IsA--> Person --CapableOf--> Taste 