Question: when did earth wind and fire september 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.'}]}, {'provenance': [{'wikipedia_id': '8051546', 'title': 'September (Earth, Wind & Fire song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 226, 'bleu_score': 0.953991849837532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2009826443309231471}, 'section': 'Section::::Abstract.'}]}]