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.

Input: Consider Input: The artist called the president by the bankers .

Output: The president called the artist .


Input: Consider Input: The presidents who recognized the author helped the students .

Output: The students helped the author .


Input: Consider Input: The tourist introduced the president who helped the senator .


Output: The president introduced the tourist .