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 scientist advised the professor .

Answer: The professor advised the scientist .


Question: The president in front of the scientists supported the secretaries .

Answer: The scientists supported the president .


Question: The banker introduced the author behind the scientist .

Answer:
The author introduced the banker .