Classify the input text into either disfluent questions or proper questions. 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.

[EX Q]: Which study suggests that previous estimates were overstated?
[EX A]: proper

[EX Q]: What do contractors verify and have existing utility lines marked or better inspect during building construction?
[EX A]: disfluent

[EX Q]: What role in academic or I mean in economics did the university play a major part in?
[EX A]:
disfluent