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 artist that believed the president called the professor .

SOLUTION: The professor called the president .

PROBLEM: The senators recognized the artists that the doctors stopped .

SOLUTION: The artists recognized the doctors .

PROBLEM: The secretary stopped the manager .

SOLUTION:
The manager stopped the secretary .