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 presidents near the tourists stopped the senator .
The tourists stopped the presidents .

The doctors encouraged the senator near the managers .
The senator encouraged the managers .

The managers helped the scientists near the doctor .

The scientists helped the doctor .