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]: What was developed in the summer of 1961?
[EX A]: proper

[EX Q]: How many of Jacksonville city's residents are older than eighteen?
[EX A]: proper

[EX Q]: What is uh maybe what rocks are a depth where they are ductilely stretched are also often what?
[EX A]:
disfluent