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 judges stopped the presidents behind the manager .
[EX A]: The presidents stopped the manager .

[EX Q]: The presidents contacted the doctor near the artist .
[EX A]: The doctor contacted the presidents .

[EX Q]: The scientists stopped the professor .
[EX A]:
The professor stopped the scientists .