Question: who sings the song back in the day
[{'answer': 'Ahmad .', 'provenance': [{'wikipedia_id': '1575349', 'title': 'Back in the Day (Ahmad song)', 'start_paragraph_id': 1, 'start_character': 38, 'end_paragraph_id': 1, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1575349', 'title': 'Back in the Day (Ahmad song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 578, 'bleu_score': 0.9043379607877141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 24583481779169902}, 'section': 'Section::::Abstract.'}]}]