Question: who wrote the song a change is gonna come
[{'answer': 'Sam Cooke', 'provenance': [{'wikipedia_id': '3033793', 'title': 'A Change Is Gonna Come', 'start_paragraph_id': 1, 'start_character': 64, 'end_paragraph_id': 1, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]