Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
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Question: When did or what type of math was advanced during the Yuan?

Answer: What type of math was advanced during the Yuan?


Question: Where, sorry, what was the seat of former party leader David McLetchie?

Answer: What was the seat of former party leader David McLetchie?


Question: Where is or uh who helped develop the first man-made self-sustaining nuclear reaction?

Answer:
Who helped develop the first man-made self-sustaining nuclear reaction?