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 secretaries introduced the author .

Answer: The author introduced the secretaries .


Question: The lawyers mentioned the students that the judge introduced .

Answer: The students mentioned the judge .


Question: The scientist who saw the doctors contacted the managers .

Answer:
The managers contacted the doctors .