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 president saw the senators who the professors encouraged .
The senators saw the president .

The tourist helped the artist who supported the senator .
The senator helped the tourist .

The tourist admired the students that the scientist recommended .

The students admired the scientist .