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 judge saw the senators by the author .
The author saw the judge .

The manager who encouraged the secretary called the professors .
The professors called the secretary .

The professors believed the judge .

The judge believed the professors .