Question: who sang the theme song to quantum of solace
[{'answer': 'Jack White', 'provenance': [{'wikipedia_id': '19845112', 'title': 'Quantum of Solace (soundtrack)', 'start_paragraph_id': 4, 'start_character': 163, 'end_paragraph_id': 4, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Development.\n'}]}, {'answer': 'Alicia Keys', 'provenance': [{'wikipedia_id': '19845112', 'title': 'Quantum of Solace (soundtrack)', 'start_paragraph_id': 4, 'start_character': 199, 'end_paragraph_id': 4, 'end_character': 210, 'bleu_score': 1.0, 'section': 'Section::::Development.\n'}]}]