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 lawyer admired the doctors near the author .
The doctors admired the lawyer .

The president behind the lawyers thanked the actor .

The actor thanked the lawyers .