Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Example Input: What types of work did the Khitans no the Han do in Eastern Asia?
Example Output:  What types of work did the Han do in Eastern Asia?

Example Input: How many Nobel laureates are alumni of the school no how many US presidents?
Example Output: How many US presidents are alumni of the school?

Example Input: When antibodies bind to antigens on the patient's own cells, rather what occurs when antibodies will not bind to the patient's cells?
Example Output:
What occurs when antibodies will not bind to the patient's cells?