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 artists who encouraged the scientists introduced the actor .
[EX A]: The actor introduced the artists .

[EX Q]: The judge contacted the banker in front of the author .
[EX A]: The banker contacted the author .

[EX Q]: The professor next to the lawyers helped the judge .
[EX A]:
The judge helped the professor .