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: I was always assigned to the mine at Cold Pass Mountain , but some officials had favorite keepers that they used like personal servants .

SOLUTION: Inversion

PROBLEM: He lay where she had thrown him , but he was struggling to a sitting posture .

SOLUTION: Original

PROBLEM: The tip of his nose touched hers and he smiled .

SOLUTION:
Original