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 presidents contacted the student near the doctors .
[EX A]: The doctors contacted the presidents .

[EX Q]: The president called the secretary that helped the scientist .
[EX A]: The scientist called the president .

[EX Q]: The tourist by the author encouraged the doctor .
[EX A]:
The doctor encouraged the author .