Question: who has won the most billboard music awards
[{'answer': 'Taylor Swift', 'provenance': [{'wikipedia_id': '566109', 'title': 'Billboard Music Award', 'start_paragraph_id': 153, 'start_character': 152, 'end_paragraph_id': 153, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Most wins.\n'}]}]