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 antigens do Helper T cells not recognize no sorry what co-receptor recruits molecules inside the T cell that are responsible for cell activation?
Output:
What co-receptor recruits molecules inside the T cell that are responsible for cell activation?