Definition: Convert a disfluent question to a proper question. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
Input: Stephen Eilmann demonstrates covert law breaking in Nazi Germany. Citizen's  had been doing what illegally?

Stephen Eilmann demonstrates covert law breaking in Nazi Germany.   Citizen's illegally had been doing what?