Question: who sang licence to kill james bond theme
[{'answer': 'Gladys Knight', 'provenance': [{'wikipedia_id': '12227659', 'title': 'Licence to Kill (soundtrack)', 'start_paragraph_id': 4, 'start_character': 38, 'end_paragraph_id': 4, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]