Question: who wrote the song unthinkable for alicia keys
[{'answer': 'Alicia Cook'}, {'answer': 'Aubrey Graham', 'provenance': [{'wikipedia_id': '26532419', 'title': "Un-Thinkable (I'm Ready)", 'start_paragraph_id': 3, 'start_character': 76, 'end_paragraph_id': 3, 'end_character': 89, 'bleu_score': 1.0, 'section': 'Section::::Composition.\n'}]}, {'answer': 'Kerry Brothers , Jr .'}, {'answer': 'Noah Shebib'}]