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 sister had been through the wringer in the romance department , but when Chris landed in her life everything changed for the better .

SOLUTION: Original

PROBLEM: No one mentioned her whereabouts , and what worried him more was he had not seen her since that night .

SOLUTION: Inversion

PROBLEM: I have no gun , and I can 't fight .

SOLUTION:
Inversion