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

The senator believed the artist who the banker supported .
The artist believed the senator .

The actor supported the secretaries .

The secretaries supported the actor .