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 contacted the artist who the tourists recommended .
The artist contacted the tourists .

The tourists that the artists saw avoided the professor .
The artists avoided the tourists .

The artist stopped the students .

The students stopped the artist .