In this task, you are given a premise sentence. Your task is to write a new sentence by substituting the subject and object (i.e., the input's subject should be output's object and vice versa.). The generated sentence must be fluent and shouldn't change the voice (i.e., passive or active) of the input.

Q: The tourists helped the secretaries behind the doctor .

A: The doctor helped the tourists .
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Q: The students recognized the presidents .

A: The presidents recognized the students .
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Q: The actors mentioned the judges that saw the doctor .

A:
The doctor mentioned the actors .
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