TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What city er where had the Mongol capital been before Kublai moved it?

SOLUTION: Where had the Mongol capital been before Kublai moved it?

PROBLEM: When were ctenophore mnemiopsis leidyi introduced into The Black Sea and the Sea of Azov ahh actually I want to know when were fish larvae accidentally introduced into the Black Sea?

SOLUTION: When were fish larvae introduced into the Black Sea accidentally?

PROBLEM: Which or no what US war caused a high amount of civil disobedience?

SOLUTION:
What US war caused a high amount of civil disobedience?