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 secretaries mentioned the judges in front of the student .
The student mentioned the secretaries .

The lawyers who the scientists encouraged introduced the senators .
The senators introduced the scientists .

The scientist mentioned the actors who called the tourists .

The tourists mentioned the scientist .