TASK DEFINITION: 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.
PROBLEM: Her shoulders convulsed with burning tears , and her throat closed over the words .

SOLUTION: Inversion

PROBLEM: Unseen branches whipped across her face and she stumbled over hidden roots .

SOLUTION: Original

PROBLEM: I returned to my work , and Lisa headed for her office .

SOLUTION:
Inversion