In this task you are given a sentence with one coordinating conjunction (for, and, nor, but, or, yet, and so). You must judge whether the order of two coordinated clausal conjoints have been inverted or not. Inversion would result in the sentence sounding unnatural. Label the instances as "Original" or "Inversion" based on your judgment.

She smiled , ruffling his fur , and he wagged his tail in response .
Inversion

His face fell and he sat down .
Original

There were two men who saw someone fall in , but they were too drunk to save the person .

Original