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 presidents contacted the doctor near the artist .

SOLUTION: The doctor contacted the presidents .

PROBLEM: The secretary behind the actor believed the tourist .

SOLUTION: The tourist believed the actor .

PROBLEM: The artists that thanked the judge helped the presidents .

SOLUTION:
The judge helped the artists .