Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
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Question: What evolved er what molecules of the adaptive immune system only exist in jawed vertebrates?

Answer: What molecules of the adaptive immune system only exist in jawed vertebrates?


Question: What is the name of the university's concert no um the summer festival?

Answer: What is the name of the university's summer festival?


Question: When did the Chao or rather the Yuan begin to use bronze printing plates for its money?

Answer:
When did the Yuan begin using bronze printing plates for its money?