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.

Example Input: Europe first colonized the Americas, then Asia, but what continent was second I mean fourth?
Example Output: Europe first colonized the Americas, then Asia, but what continent was fourth?

Example Input: The emplacement of dike swarms are a result of looking for causes of hillslopes and channel erosion? , What activity er what causes hillslopes and channels to erode?
Example Output: What causes hillslopes and channels to erode?

Example Input: Why were uh nevermind, Harold Wilson published a report in what year?
Example Output:
Harold Wilson published a report in what year?