instruction:
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.
question:
The authors behind the doctors advised the banker .
answer:
The banker advised the doctors .


question:
The senators mentioned the student in front of the professor .
answer:
The student mentioned the senators .


question:
The professors mentioned the author who stopped the tourists .
answer:

The author mentioned the professors .