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 artist by the tourist encouraged the author .
The author encouraged the artist .

The secretary advised the doctors in front of the tourists .
The doctors advised the secretary .

The authors near the tourist introduced the artist .

The artist introduced the authors .