Question: who sings keep your head to the sky
[{'answer': 'Maurice White', 'provenance': [{'wikipedia_id': '22887940', 'title': 'Keep Your Head to the Sky', 'start_paragraph_id': 3, 'start_character': 41, 'end_paragraph_id': 3, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}]