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 senators called the judges who contacted the doctor .
Example Output: The doctor called the senators .

Example Input: The tourists that the artists saw avoided the professor .
Example Output: The artists avoided the tourists .

Example Input: The senator saw the artist .
Example Output:
The artist saw the senator .