instruction:
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.
question:
John closed the trapdoor behind us , and once in the dark I heaved a sigh .
answer:
Original


question:
Lorraine seemed to blame him , and his American friend was dead .
answer:
Inversion


question:
He looked at his partner , and they left .
answer:

Original