TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What specific groups are found within the African-American population, I take that back, the Mexican-American population?

SOLUTION: What specific groups are found within the Mexican-American population?

PROBLEM: What conditions must be met for a prescription for a controlled substance to be invalid no rather valid?

SOLUTION: What conditions must be met for a prescription for a controlled substance to be valid?

PROBLEM: The Stagg Presidential Center is set to begin or wait finished in what year?

SOLUTION:
The Stagg Presidential Center is set to be finished in what year?