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.
--------
Question: The doctors stopped the athlete in front of the author .

Answer: The athlete stopped the author .


Question: The professors avoided the athletes .

Answer: The athletes avoided the professors .


Question: The scientist introduced the professor who saw the banker .

Answer:
The banker introduced the scientist .