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]: Who ranked Warsaw as 22nd most liveable city in Europe, oh actually, in the world?
[EX A]: disfluent

[EX Q]: Who challenged bubonic plague theory I mean who first came up with it?
[EX A]:
disfluent