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 doctor introduced the scientist who believed the athlete .

Answer: The athlete introduced the doctor .


Question: The secretaries stopped the presidents .

Answer: The presidents stopped the secretaries .


Question: The artists mentioned the tourists who the doctor saw .

Answer:
The tourists mentioned the doctor .