TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What was the RAND no the Report R-2626?

SOLUTION: What was Report R-2626?

PROBLEM: What type of forces act at very long distances or rather what forces are responsible for the interactions between atomic particles?

SOLUTION: What forces are responsible for the interactions between atomic particles?

PROBLEM: What uprising oh or when did the Yuan people suffer a series of unnatural disasters?

SOLUTION:
When did the Yuan people suffer a series of unnatural disasters?