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.

[EX Q]: Caroline feared she would arrive back in Chicago with neither a father nor a telepath .
[EX A]: Changed

[EX Q]: The classrooms were furnished with desks .
[EX A]: Original

[EX Q]: The train slowly picked up speed , blue sparks spitting from the overhead conduit , as it pulled away towards the bridge .
[EX A]:
Original