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

Q: Who or no rather what exposes organisms to infection?

A: What exposes organisms to infection?
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Q: David Castlles-Quintana and Vicente Royuela do what for a hobby or I mean living?

A: What do David Castlles-Quintana and Vicente Royuela do for a living?
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Q: What weren't er when didn't Washington learn about Trent's retreat?

A:
When didn't Washington learn about Trent's retreat?
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