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 professor by the artists advised the secretaries .
The secretaries advised the professor .

The president mentioned the tourists near the senators .

The senators mentioned the president .