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 tourists next to the doctors recognized the senator .
The doctors recognized the tourists .

The author saw the bankers near the lawyer .
The lawyer saw the author .

The presidents stopped the athletes that called the scientist .

The athletes stopped the presidents .