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.

Example Input: John closed the trapdoor behind us , and once in the dark I heaved a sigh .
Example Output: Original

Example Input: We all turned to listen to her comments , and she began walking toward us .
Example Output: Inversion

Example Input: This time he didn 't surprise her , but she waited for him to say more .
Example Output:
Inversion