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 tourist avoided the scientist by the students .
answer:
The scientist avoided the students .


question:
The senator saw the professors by the students .
answer:
The professors saw the students .


question:
The actors introduced the authors .
answer:

The authors introduced the actors .