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.

The banker believed the judges behind the students .
The judges believed the banker .

The athletes called the artist next to the manager .
The artist called the manager .

The lawyer in front of the presidents helped the banker .

The banker helped the presidents .