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.
--------
Question: Who were later Yuan emperors isolated with?

Answer: proper


Question: For what certificate does the legislature conduct examinations?

Answer: proper


Question: Where no, sorry, when is antibody production higher than normal?

Answer:
disfluent