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.

Q: Chalmers shook his head , frustrated by Nightingale 's poor attempt at sundown .

A: Changed
****
Q: An advance on his grenades was what he wanted so he had said .

A: Changed
****
Q: Everyone was on their feet , all talking at once , marveling over the birth of Helen 's first grandchild and Sam 's new niece .

A:
Original
****