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.

[EX Q]: The doctors stopped the presidents next to the lawyers .
[EX A]: The presidents stopped the lawyers .

[EX Q]: The president admired the scientist who the tourist mentioned .
[EX A]: The scientist admired the president .

[EX Q]: The presidents stopped the doctors in front of the secretary .
[EX A]:
The doctors stopped the secretary .