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.
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Question: The presidents recognized the professors .

Answer: The professors recognized the presidents .


Question: The professors who the secretary contacted recognized the scientists .

Answer: The scientists recognized the professors .


Question: The authors near the presidents admired the actor .

Answer:
The actor admired the presidents .