instruction:
In this task, you are given a sentence. You must judge whether a single noun or verb has been replaced with another word with the same part of speech. The inversion would result in the sentence sounding unnatural, So unnatural sentences will be considered changed. Label the instances as "Original" or "Changed" based on your judgment.
question:
Chalmers shook his head , frustrated by Nightingale 's poor attempt at sundown .
answer:
Changed


question:
You 've certainly learnt a lesson , the submarine will be very interested in you . "
answer:
Changed


question:
Evidently he hadn 't realized the expense involved in a young firefighter 's season .
answer:

Changed