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: What city, well area actually, remained uninhabited for thousands of years?

A: What area remained uninhabited for thousands of years?
****
Q: how does or I mean what network type does X.25 use?

A:
X.25 uses what type network type
****