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.

[EX Q]: The tourists helped the secretaries behind the doctor .
[EX A]: The doctor helped the tourists .

[EX Q]: The athletes admired the authors .
[EX A]: The authors admired the athletes .

[EX Q]: The artist called the president by the bankers .
[EX A]:
The president called the artist .