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 judge believed the artists .

SOLUTION: The artists believed the judge .

PROBLEM: The students in front of the senator contacted the manager .

SOLUTION: The manager contacted the students .

PROBLEM: The doctors believed the presidents that the artists called .

SOLUTION:
The artists believed the doctors .