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 actor who supported the manager contacted the presidents .

SOLUTION: The presidents contacted the actor .

PROBLEM: The doctors next to the secretary avoided the presidents .

SOLUTION: The presidents avoided the doctors .

PROBLEM: The scientists that the professor stopped called the senators .

SOLUTION:
The senators called the professor .