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]: Why was the Kleitman-Aserinsky experiment conducted?
[EX A]: proper

[EX Q]: What can experiments be used to explain beside magma crystallization?
[EX A]: proper

[EX Q]: Which job does not require that the member be a citizen of the UK?
[EX A]:
proper