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 actors introduced the secretaries .

SOLUTION: The secretaries introduced the actors .

PROBLEM: The presidents who recognized the author helped the students .

SOLUTION: The students helped the author .

PROBLEM: The scientists advised the author .

SOLUTION:
The author advised the scientists .