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 actor saw the senator .
Example Output: The senator saw the actor .

Example Input: The lawyer helped the judges .
Example Output: The judges helped the lawyer .

Example Input: The scientist mentioned the senators who the professors admired .
Example Output:
The senators mentioned the scientist .