Question: who wrote the song changes by david bowie
[{'answer': 'David Bowie', 'provenance': [{'wikipedia_id': '2857743', 'title': 'Changes (David Bowie song)', 'start_paragraph_id': 0, 'start_character': 9, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]