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 lawyer called the senator in front of the president .
The senator called the lawyer .

The secretaries mentioned the athletes .
The athletes mentioned the secretaries .

The lawyers who supported the actor called the presidents .

The presidents called the lawyers .

