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.

The doctor admired the judge who the athlete helped .
The judge admired the doctor .

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

The artists near the president mentioned the athlete .

The president mentioned the artists .