TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: When did What centuries did the Roman times take place within?

SOLUTION: What centuries did the Roman times take place within?

PROBLEM: What is er uh what evolved in later vertebrates?

SOLUTION: What evolved in later vertebrates?

PROBLEM: The movements  no Cydippids combs are controlled by what?

SOLUTION:
Cydippids combs are controlled by what?