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.

Example Input: It was on a swivel base , operated by a crank at the left-hand side .
Example Output: Original

Example Input: The steamer trunks weren 't there when they left , though he conceded they might have been hidden behind the plywood sheets .
Example Output: Original

Example Input: I hefted myself up over the sill and pulled myself through the open , angled window .
Example Output:
Original