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.

Q: The president next to the doctor thanked the scientist .

A: The scientist thanked the doctor .
****
Q: The managers saw the actors that the authors advised .

A: The actors saw the authors .
****
Q: The doctors stopped the athlete in front of the author .

A:
The athlete stopped the author .
****