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

Example Input: United States or no make that NSF began in 1985 to promote what?
Example Output: NSF began in 1985 to promote what?

Example Input: What is the the old north no the old south branch of the Rhine called?
Example Output: What is the the old south branch of the Rhine called?

Example Input: When is or actually what protein does not effect T-cell differentiation?
Example Output:
What protein does not effect T-cell differentiation?