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]: How is er what are refineries often called?
[EX A]: disfluent

[EX Q]: Who was on Celeron's expedition?
[EX A]: proper

[EX Q]: When was the um no in what year was Scott and Duncan's research published?
[EX A]:
disfluent