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:
As soon as they stepped onto the top step , the front door opened and a man was standing there , smiling .
answer:
Original


question:
The sound echoed through the sanctuary , and Ponytail nearly did a backflip .
answer:
Original


question:
His thoughts had been scattered well before the heavy had struck him , but * * * * * David 's head ached from Venn 's blows .
answer:

Inversion