You will be given a definition of a task first, then some input of the task.
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.

Why did Yuan's successors win control of the rest of the Mongol empire, oops Kublai's successor?
Output:
Why did Kublai's successors win control of the rest of the Mongol empire?