Question: who sang the theme to licence to kill
[{'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.'}]}, {'provenance': [{'wikipedia_id': '12227659', 'title': 'Licence to Kill (soundtrack)', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 631, 'bleu_score': 0.8161386575129681, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 971062077377595709}, 'section': 'Section::::Abstract.'}]}]