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 in front of the athlete introduced the secretary .
[EX A]: The secretary introduced the athlete .

[EX Q]: The lawyer admired the doctors near the author .
[EX A]: The doctors admired the lawyer .

[EX Q]: The presidents helped the professor .
[EX A]:
The professor helped the presidents .