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

What keeps the sensitivity of hormones at the same level, oh I mean the immune system?
What keeps the sensitivity of the immune system at the same levels? 

What was one of the Marseille or no make that Hanseatic cities?
What was one of the Hanseatic cities?

Who was the first player to win the Heisman Trophy in the NCAA no sorry in the university?
What player first won the Heisman Trophy for the university?