Screen entails/necessarily involves Eliminate. Background is a type of Screen. Background is the opposite of Prominent. 
Reward is a type of Transfer. Reward is related to Extra. Extra is related to Spare. 
Eliminate <--Entails-- Screen <--IsA-- Background <--Antonym--> Prominent 
Transfer <--IsA-- Reward <--RelatedTo--> Extra <--RelatedTo--> Spare 