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 judge contacted the banker in front of the author .
The banker contacted the author .

The doctor in front of the manager encouraged the bankers .
The bankers encouraged the doctor .

The senator stopped the scientist that believed the professors .

The scientist stopped the senator .