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]: When was the strongly influenced delta no the Holocene?
[EX A]: disfluent

[EX Q]: Stage 2 of the bill is where who is in charge of the bill?
[EX A]: proper

[EX Q]: What methods do petrologists use to examine rocks out in the field?
[EX A]:
proper