TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What social problems no what nationality aren't researchers Richard G. Wilkinson and Kate Pickett?

SOLUTION: What nationality aren't researchers Richard G. Wilkinson and Kate Pickett?

PROBLEM: What did Article 20 of the Allied Armistice terms require Warsaw no Germany to withdraw from?

SOLUTION: What did Article 20 of the Allied Armistice terms require Germany to withdraw from?

PROBLEM: Where no wait how did war start?

SOLUTION:
How did war start?