Question: who sang the song if i were a boy
[{'answer': 'Beyoncé', 'provenance': [{'wikipedia_id': '19217023', 'title': 'If I Were a Boy', 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19217023', 'title': 'If I Were a Boy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 923, 'bleu_score': 0.8766315133529541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16700132191888405162}, 'section': 'Section::::Abstract.'}]}]