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 lawyers in front of the actor stopped the tourist .
answer:
The tourist stopped the actor .


question:
The tourist contacted the lawyer .
answer:
The lawyer contacted the tourist .


question:
The author by the actor thanked the doctor .
answer:

The doctor thanked the author .