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.

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

" I know most authors hate doing signings , but I can promise you a success !
Original

I take the dress off the aftermath , then slip it on .

Changed