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: The doors opened , and we stepped off .

SOLUTION: Original

PROBLEM: It should have opened then , but it didn 't .

SOLUTION: Original

PROBLEM: He had so many questions for her , but he kept them to himself .

SOLUTION:
Original