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 senator saw the professors by the students .
[EX A]: The professors saw the students .

[EX Q]: The judge who the authors contacted recommended the students .
[EX A]: The students recommended the judge .

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