Question: who was the first person to master the art of printing polyphonic music
[{'answer': 'Ottaviano Petrucci', 'provenance': [{'wikipedia_id': '4346392', 'title': 'History of music publishing', 'start_paragraph_id': 5, 'start_character': 40, 'end_paragraph_id': 5, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Printing.:Petrucci.\n'}]}, {'provenance': [{'wikipedia_id': '4346392', 'title': 'History of music publishing', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 744, 'bleu_score': 0.9832621206481431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1361297954053655772}, 'section': 'Section::::Printing.:Petrucci.\n'}]}]