Contract is the opposite of Extend. Extend is related to Make. Make is a type of See. See is related to Observation. 
Help requires Teach. Teach is a synonym of Instruct. 
Contract <--Antonym--> Extend <--RelatedTo--> Make --IsA--> See <--RelatedTo--> Observation 
Help --HasPrerequisite--> Teach <--Synonym--> Instruct 