TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What is the Rhine, scratch that, where does its name come from?

SOLUTION: Where does the name Rhine derive from? 

PROBLEM: How many provinces did the Ottoman empire control on three continents er contain in the 17th century?

SOLUTION: How many provinces did the Ottoman empire contain in the 17th century?

PROBLEM: What were woodblocks no chao made out of?

SOLUTION:
What were chao made out of?