Question: when did september earth wind and fire come out
[{'answer': '1978', 'provenance': [{'wikipedia_id': '8051546', 'title': 'September (Earth, Wind & Fire song)', 'start_paragraph_id': 1, 'start_character': 162, 'end_paragraph_id': 1, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]