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 athlete helped the judges .
The judges helped the athlete .

The athletes in front of the artist called the judge .
The judge called the artist .

The judge who thanked the senator contacted the actors .

The actors contacted the senator .