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 that called the author saw the artist .
The author saw the judges .

The professors that called the president avoided the student .
The student avoided the president .

The tourist admired the professor who the secretary stopped .

The secretary admired the tourist .