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 tourists thanked the doctor .
[EX A]: The doctor thanked the tourists .

[EX Q]: The athletes stopped the tourists .
[EX A]: The tourists stopped the athletes .

[EX Q]: The presidents that the actor saw contacted the lawyer .
[EX A]:
The actor contacted the presidents .