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.

Nodding , he reaches for the single photograph left on the camper , tucked now behind the Christmas village , and holds it close .
Changed

As they expand they can add more stoves . "
Original

Her ailment remained a mystery .

Original