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: Up until 1990, Saudi Arabia played an important role in restraining what groups no wait which groups did it play an unimportant role in restraining?

Up until 1990, Saudi Arabia played an unimportant role in restraining what groups?