Trade is related to Agreement. Agreement is the opposite of Dispute. Controversy is a type of Dispute. 
Oak is related to Wood. Wood is related to Age. Age is related to People. Initiate is a type of People. 
Trade <--RelatedTo--> Agreement <--Antonym--> Dispute <--IsA-- Controversy 
Oak <--RelatedTo--> Wood <--RelatedTo--> Age <--RelatedTo--> People <--IsA-- Initiate 