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 doctors contacted the bankers behind the professors .

SOLUTION: The professors contacted the doctors .

PROBLEM: The scientist that the tourists mentioned supported the secretary .

SOLUTION: The secretary supported the scientist .

PROBLEM: The senator who the doctor mentioned recognized the bankers .

SOLUTION:
The bankers recognized the senator .