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 professor supported the actor behind the scientist .
[EX A]: The scientist supported the professor .

[EX Q]: The artist called the actor by the scientists .
[EX A]: The actor called the artist .

[EX Q]: The doctors contacted the authors .
[EX A]:
The authors contacted the doctors .