Question: when did the home run derby format change
[{'answer': 'in 2014', 'provenance': [{'wikipedia_id': '813519', 'title': 'Home Run Derby', 'start_paragraph_id': 19, 'start_character': 52, 'end_paragraph_id': 19, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::Overview.:Format.:2014.\n'}]}, {'provenance': [{'wikipedia_id': '813519', 'title': 'Home Run Derby', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 822, 'bleu_score': 0.9636095698531311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4817342224876673991}, 'section': 'Section::::Overview.:Format.:2014.\n'}]}]