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 does ARPANET in simple terms?
[A]: proper


[Q]: What concept did philosophers in antiquity use in the study of stationary and moving objects or rather to study simple machines?
[A]: disfluent


[Q]: What were European countries not doing during the 1700's?
[A]:
proper