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 lawyers that helped the managers called the president .

SOLUTION: The managers called the lawyers .

PROBLEM: The actors that the tourist introduced recognized the banker .

SOLUTION: The banker recognized the actors .

PROBLEM: The senators saw the presidents behind the artist .

SOLUTION:
The presidents saw the senators .