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.

I was nervous , but I was also sure .
Original

I took the opposite breast in my mouth , and my kiss traveled the valley of her chest .
Inversion

His expression was pained , but he didn 't argue this time .

Original