Question: who wrote many of the classics of the ragtime repertoire
[{'answer': 'Scott Joplin', 'provenance': [{'wikipedia_id': '26553', 'title': 'Ragtime', 'start_paragraph_id': 6, 'start_character': 157, 'end_paragraph_id': 6, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::History.:Origins of ragtime.\n'}]}]