Question: who was a famous jazz musician in 1920
[{'answer': 'Louis Daniel Armstrong', 'provenance': [{'wikipedia_id': '18313', 'title': 'Louis Armstrong', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18313', 'title': 'Louis Armstrong', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 378, 'bleu_score': 0.9297257490286691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1431794479474848556}, 'section': 'Section::::Abstract.'}]}]