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 scientist that the student encouraged helped the author .

SOLUTION: The author helped the scientist .

PROBLEM: The athlete recognized the banker .

SOLUTION: The banker recognized the athlete .

PROBLEM: The manager contacted the tourists who the professor believed .

SOLUTION:
The tourists contacted the professor .