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.

Where did umm no I mean when did the Holocene end?
disfluent

What popular environmentalist is also a university alumni member?
proper

Cytokine TBF-B suppresses the activity of what cell types?

proper

