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.

[Q]: What has the U of C maintained since 1938?
[A]: proper


[Q]: Where does Lake Constance, oh no I mean, the Delta in the Netherlands begin?
[A]: disfluent


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