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 doctors stopped the presidents next to the lawyers .
The presidents stopped the lawyers .

The professor mentioned the managers .
The managers mentioned the professor .

The tourist who the managers avoided recognized the doctors .

The doctors recognized the managers .