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 judges recognized the authors behind the president .
The authors recognized the president .

The author believed the artist .
The artist believed the author .

The artist avoided the professor .

The professor avoided the artist .