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: His face was the picture of innocence , but I caught the amusement in his voice .

SOLUTION: Original

PROBLEM: Work groups were not entirely satisfactory , and practically no one went to church .

SOLUTION: Inversion

PROBLEM: Defending himself in the nude was something he had done only once before , and vowed would never happen again .

SOLUTION:
Original