Question: who was regarded as the first free jazz musician
[{'answer': 'Ornette Coleman', 'provenance': [{'wikipedia_id': '99040', 'title': 'Free jazz', 'start_paragraph_id': 8, 'start_character': 36, 'end_paragraph_id': 8, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Characteristics.\n'}]}]