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 student avoided the actor by the scientist .
The actor avoided the scientist .

The athlete next to the authors introduced the senators .
The senators introduced the authors .

The lawyers next to the scientist advised the president .

The president advised the scientist .