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

[Q]: What is cost engineers no no scratch that what is an obvious source for cost engineers?
[A]: What is an obvious source for cost engineers?


[Q]: How many er the strong force is due to the exchange of what?
[A]: The strong force is due to the exchange of what?


[Q]: In what year was the Kalven or is it the Darfur Report, what year was it issued?
[A]:
In what year was the Darfur Report issued?