Marine is related to Boat. Boat is related to Shit. Shed is etymologically related to Shit. Shed is a type of Remove. 
Subject is related to Reply. Reply is the opposite of Ignore. Ignore is the opposite of Stare. 
Marine <--RelatedTo--> Boat <--RelatedTo--> Shit <--EtymologicallyRelatedTo-- Shed --IsA--> Remove 
Subject <--RelatedTo--> Reply <--Antonym--> Ignore <--Antonym--> Stare 