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: There was a tightness in the tendons of her neck , and her nostrils flared at each breath .

SOLUTION: Original

PROBLEM: The ice crystals had melted into puddles on the floor , and one corner of the envelope was soaked as a result .

SOLUTION: Original

PROBLEM: It worried her and Anna was having trouble sleeping .

SOLUTION:
Inversion