Question: who won big brother battle back season 18
[{'answer': 'Victor', 'provenance': [{'wikipedia_id': '47072176', 'title': 'Big Brother 18 (American season)', 'start_paragraph_id': 10, 'start_character': 424, 'end_paragraph_id': 10, 'end_character': 430, 'bleu_score': 1.0, 'section': 'Section::::Twists.:Battle Back.\n'}]}, {'provenance': [{'wikipedia_id': '47072176', 'title': 'Big Brother 18 (American season)', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 520, 'bleu_score': 0.89437051372201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9078251604280976911}, 'section': 'Section::::Twists.:Battle Back.\n'}]}]