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 president thanked the lawyer .
answer:
The lawyer thanked the president .


question:
The scientist that the student encouraged helped the author .
answer:
The author helped the scientist .


question:
The actors stopped the athlete .
answer:

The athlete stopped the actors .