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]: The rock face was steep , but provided many hand and footholds to aid in climbing .
[A]: Original


[Q]: Towels , sheets , serviettes , tablecloths were all washed , starched and grayed , by Veronika .
[A]: Changed


[Q]: The young man paced up to the small ventilation window , staring out but not really seeing .
[A]:
Changed