Question: who is the defending coke zero sugar 400 champion
[{'answer': 'Erik Jones', 'provenance': [{'wikipedia_id': '12230576', 'title': 'Coke Zero Sugar 400', 'start_paragraph_id': 40, 'start_character': 239, 'end_paragraph_id': 40, 'end_character': 249, 'bleu_score': 1.0, 'section': 'Section::::History.:First wins.\n'}]}, {'provenance': [{'wikipedia_id': '12230576', 'title': 'Coke Zero Sugar 400', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 48, 'bleu_score': 0.570674577705599, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14074987642999983279}, 'section': 'Section::::Abstract.'}]}]