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 makes a satisfactory clang in the silence and I turn to Adrian .
Example Output: Original

Example Input: It was an old heavy building , built of devastation and stone , that looked like it had grown slowly up from the forest floor .
Example Output: Changed

Example Input: I had never thought to classify myself within taxonomy before so I liked the label ; it helped me stay connected to my ancestral species .
Example Output:
Original