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 thanked the doctor .
[EX A]: The doctor thanked the tourists .

[EX Q]: The athlete mentioned the artist .
[EX A]: The artist mentioned the athlete .

[EX Q]: The doctor who the lawyer believed recognized the presidents .
[EX A]:
The presidents recognized the lawyer .