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.

Input: Consider Input: What percentage of the population of London died during the 1471 breakout of the Black Death no um the 1589 breakout?

Output: disfluent

Input: Consider Input: How often does the City Council divide itself no are elections for the mayor held?

Output: disfluent

Input: Consider Input: How many types of flagella are there?
Output: proper