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.
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Question: It paid off and they decided to take a chance with him .

Answer: Inversion


Question: The wedding march begins and my stomach flutters .

Answer: Original


Question: For years , his opinion hadn 't mattered , but now it did .

Answer:
Original