Question: who sings it must be love on the brain
[{'answer': 'Rihanna', 'provenance': [{'wikipedia_id': '48210092', 'title': 'Love on the Brain', 'start_paragraph_id': 1, 'start_character': 49, 'end_paragraph_id': 1, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48210092', 'title': 'Love on the Brain', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 702, 'bleu_score': 0.9515173987222341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6277540298866556087}, 'section': 'Section::::Abstract.'}]}]