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 actor helped the secretary near the athletes .
The secretary helped the actor .

The judge saw the author that helped the actor .
The author saw the the actor .

The secretary introduced the actors by the author .

The author introduced the secretary .