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 professors introduced the artists .
The artists introduced the professors .

The authors behind the students encouraged the managers .
The managers encouraged the students .

The student who the judges introduced saw the athlete .

The judges saw the student .