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 's possible but that 's deep .

SOLUTION: Inversion

PROBLEM: He treaded water for the both of us , holding me up , and I marveled at his strength .

SOLUTION: Original

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