Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Example Input: How do Ocryopsis er uh platyctenids reproduce?
Example Output: How do platyctenids reproduce?

Example Input: When were ctenophore mnemiopsis leidyi introduced into The Black Sea and the Sea of Azov ahh actually I want to know when were fish larvae accidentally introduced into the Black Sea?
Example Output: When were fish larvae introduced into the Black Sea accidentally?

Example Input: What did uh who was the first known European to visit China and return?
Example Output:
Who was the first known European to visit China and return?