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: It was empty , but he kept it as a reminder of his purpose .

SOLUTION: Original

PROBLEM: He stepped neatly to one side to let her through , but she settled for flicking Nicky a murderous look .

SOLUTION: Original

PROBLEM: He wasn 't surprised , and the truth hadn 't snuck up on him .

SOLUTION:
Inversion