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.

Example Input: Who was on Celeron's expedition?
Example Output: proper

Example Input: Where do most students at the Groton School come from?
Example Output: proper

Example Input: How long is the Upper Rhine Plain?
Example Output:
proper