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 author encouraged the judges who the managers introduced .
[EX A]: The judges encouraged the author .

[EX Q]: The tourist thanked the artists in front of the managers .
[EX A]: The artists thanked the managers .

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