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: It just seemed much more fun when all the bystanders participated .

SOLUTION: Changed

PROBLEM: My tongue flicks out and runs inside her low-cut shirt and bra , reaching until it flicks against her nipple .

SOLUTION: Original

PROBLEM: " Doctors are supposed to be weak emotionally but that one isn 't weak at all .

SOLUTION:
Changed