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: His laughter faded and his expression hardened .

SOLUTION: Original

PROBLEM: It was slung over his shoulder and he had his tuxedo in a garment bag .

SOLUTION: Inversion

PROBLEM: He didn 't care , but his Collar sparked , driving pain into his neck .

SOLUTION:
Inversion