TASK DEFINITION: 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.
PROBLEM: Seconds later it exploded , sending out a spray of small metal rods .

SOLUTION: Original

PROBLEM: " Okay , maybe a thousand , " the man said quickly , backtracking .

SOLUTION: Original

PROBLEM: In that case B 's position would always have been sprouting from A 's position .

SOLUTION:
Changed