TASK DEFINITION: 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.
PROBLEM: The artists who the scientist admired saw the athlete .

SOLUTION: The scientist saw the artists .

PROBLEM: The doctor that the scientist admired mentioned the presidents .

SOLUTION: The presidents mentioned the doctor .

PROBLEM: The scientists who called the doctors thanked the actor .

SOLUTION:
The actor thanked the doctors .