Part 1. Definition
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
Part 2. Example
Who did the Han Chinese want to help the Khitan no I mean the Mongols fight?
Answer: Who did the Han Chinese want to help the Mongols fight?
Explanation: The input initially means Khitan and then changes to Mongols, hence this is correct.
Part 3. Exercise
What is not caused by infections ugh disorders of the immune system?
Answer:
What is not caused by disorders of the immune system?