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 senator believed the tourist who the scientists contacted .
The tourist believed the scientists .

The athletes encouraged the lawyers .
The lawyers encouraged the athletes .

The judge that thanked the tourist helped the professor .

The professor helped the tourist .