def breakdown(data):
    """Break down each row into context-utterance pairs.
    Each pair is labeled to indicate truth (1.0) vs distraction (0.0).
    Output is a native array with format : [context, utterance, label]"""
    output = []
    for row in data:
        context = row[0]
        ground_truth_utterance = row[1]
        output.append([list(context), ground_truth_utterance, 1.0])
        for i in range(2,11):
            output.append([list(context), row[i], 0.0])
    return output