Question: as blues moved into chicago's south side what style of blues developed
[{'answer': 'The Chicago blues', 'provenance': [{'wikipedia_id': '171903', 'title': 'Chicago blues', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '171903', 'title': 'Chicago blues', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 783, 'bleu_score': 0.5345751207618981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4553955782516109876}, 'section': 'Section::::History.\n'}]}]