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

Who is no what famous conductor went to Harvard?
What famous conductor went to Harvard?

Who was the main detractor of the humoral theory of immunity, oh scratch that, I mean cellular theory?
Who was the main detractor of the cellular theory of immunity?

How did scientists sample the DNA/RNA of yersinia pestis no no tell me how they assessed the DNA / RNA?
How did scientists assess the DNA/RNA of yersinia pestis?