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]: The production of what signalling molecules is regulated by Vitamin D, oh sorry, the immune system?
[EX A]: disfluent

[EX Q]: For the Liberals, the former party leader no no a main disappointment was what?
[EX A]: disfluent

[EX Q]: What allows the adaptive immune system to react faster and more strongly each subsequent time a pathogen is encountered?
[EX A]:
proper

