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 scientists next to the professors thanked the artist .
The artist thanked the professors .

The professors believed the managers .
The managers believed the professors .

The presidents thanked the managers who believed the author .

The managers thanked the presidents .