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 student that helped the bankers mentioned the tourist .

SOLUTION: The bankers mentioned the student .

PROBLEM: The president thanked the lawyer .

SOLUTION: The lawyer thanked the president .

PROBLEM: The scientist encouraged the senator .

SOLUTION:
The senator encouraged the scientist .