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

Example Input: According to the wealth concentration theory how does or no what advantage do the wealthy have in accumulating new wealth?
Example Output: According to the wealth concentration theory, what advantage do the wealthy have in accumulating new wealth?

Example Input: Where rather who was one of the most famous people born in Warsaw?
Example Output: Who was one of the most famous people born in Warsaw?

Example Input: What cells are used to multiply  no What cells do helper B cells assist?
Example Output:
What cells do helper B cells assist?