Example prediction file
example_predictions.csv is a tiny synthetic score file for smoke-testing the metric
scripts. It is not a model result. Real judge outputs can use the same schema:
sample_id,example_type,negative_index,score
For positive triplets, use example_type=positive and negative_index=-1.
For negative triplets, use example_type=negative and the index of the
corresponding entry in instruction_neg_list.