Question: who wins big brother battle back season 19
[{'answer': 'Cody', 'provenance': [{'wikipedia_id': '51296550', 'title': 'Big Brother 19 (American season)', 'start_paragraph_id': 18, 'start_character': 422, 'end_paragraph_id': 18, 'end_character': 426, 'bleu_score': 1.0, 'section': 'Section::::Production.:Twists.:Battle Back Showdown.\n'}]}, {'provenance': [{'wikipedia_id': '51296550', 'title': 'Big Brother 19 (American season)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1177, 'bleu_score': 0.9330809246976861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12447470840722667188}, 'section': 'Section::::Production.:Twists.:Battle Back Showdown.\n'}]}]