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 Input:
How do other researchers believe Porifera evolved and developed its neural cells?

Ex Output:
proper


Ex Input:
What town charter was approved in 1821?

Ex Output:
proper


Ex Input:
When is the oldest armed seal of Varsoviensis or I meant seal ofWarsaw from?

Ex Output:

disfluent