Rest is related to Middle. Middle is related to Summer. 
Taxpayer is derived from Tax. Tax is related to Service. Service is related to Voluntary. Voluntary is the opposite of Automatic. 
Rest <--RelatedTo--> Middle <--RelatedTo--> Summer 
Taxpayer --DerivedFrom--> Tax <--RelatedTo--> Service <--RelatedTo--> Voluntary <--Antonym--> Automatic 