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 athlete saw the secretary next to the student .
The secretary saw the athlete .

The professors introduced the artists .
The artists introduced the professors .

The lawyer that the athlete called thanked the professor .

The athlete thanked the lawyer .