In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

What type of government did the constitution establish for the united states?
Constitutional presidential republic

How are point sources of pollution regulated by the cwa?
requires dischargers to obtain a National Pollutant Discharge Elimination System (NPDES) permit

Who played wayne in sometimes they come back?

Chris Demetral