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.

Example Input: The artists admired the professor that the senator called .
Example Output: The professor admired the artists .

Example Input: The professors thanked the judges by the artist .
Example Output: The judges thanked the professors .

Example Input: The president who the doctor recommended introduced the tourist .
Example Output:
The doctor introduced the president .