You will be given a definition of a task first, then some input of the task.
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

What is a regulatory factor I meant to say are two types of phagocytes that travel through the body to find invading pathogens?
Output:
What are two types of phagocytes that travel through the body to find invading pathogens?