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]: Who leads The Islamic State?
[EX A]: proper

[EX Q]: What is the system of many biological structures and processes that protect an organism from cold?
[EX A]: proper

[EX Q]: What is the lowest point of the Rhine basin called?
[EX A]:
proper