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 secretaries mentioned the lawyers who the students recommended .
The lawyers mentioned the secretaries .

The artist by the authors contacted the lawyers .
The lawyers contacted the artist .

The scientist who the lawyer helped avoided the professors .

The lawyer avoided the scientist .