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

Example Input: What is cost engineers no no scratch that what is an obvious source for cost engineers?
Example Output: What is an obvious source for cost engineers?

Example Input: When no sorry Who stated he did not want Israel to vanish?
Example Output:  Who stated he did not want Israel to vanish?

Example Input: What impact um what contributed to the increased inequality between trained and untrained workers?
Example Output:
What contributed to the increased inequality between trained and untrained workers?