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

[EX Q]: Who was the main detractor of the humoral theory of immunity, oh scratch that, I mean cellular theory?
[EX A]: Who was the main detractor of the cellular theory of immunity?

[EX Q]: When was no wait Who directed Life Itself?
[EX A]: Who directed Life Itself?

[EX Q]: What did Niels Jerne formulate before the 1950s no Frank Burnet?
[EX A]:
What did Frank Burnet formulate before the 1950s?