Servant is related to Middle. Middle is the opposite of Edge. Edge is related to Part. 
Paper is related to Contract. Contract is the opposite of Extend. Extend is a type of Straighten. 
Servant <--RelatedTo--> Middle <--Antonym--> Edge <--RelatedTo--> Part 
Paper <--RelatedTo--> Contract <--Antonym--> Extend --IsA--> Straighten 