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 tourists encouraged the authors who thanked the judges .

SOLUTION: The authors encouraged the the judges .

PROBLEM: The presidents helped the scientists .

SOLUTION: The scientists helped the presidents .

PROBLEM: The judge introduced the athlete .

SOLUTION:
The athlete introduced the judge .