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 recognized the actor by the tourists .

SOLUTION: The actor recognized the tourists .

PROBLEM: The artist called the president by the bankers .

SOLUTION: The president called the artist .

PROBLEM: The lawyer by the professors stopped the athletes .

SOLUTION:
The professors stopped the lawyer .