Question: who sings age ain't nothing but a number
[{'answer': 'Aaliyah', 'provenance': [{'wikipedia_id': '2314172', 'title': "Age Ain't Nothing but a Number", 'start_paragraph_id': 1, 'start_character': 76, 'end_paragraph_id': 1, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2314172', 'title': "Age Ain't Nothing but a Number", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 856, 'bleu_score': 0.9436774482460261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4315314076345851745}, 'section': 'Section::::Abstract.'}]}]