Question: muddy waters is associated with which subgenre of the blues
[{'answer': 'Chicago blues', 'provenance': [{'wikipedia_id': '61855', 'title': 'Muddy Waters', 'start_paragraph_id': 1, 'start_character': 188, 'end_paragraph_id': 1, 'end_character': 201, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '61855', 'title': 'Muddy Waters', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 201, 'bleu_score': 0.8508209161198661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6274178466948381220}, 'section': 'Section::::Abstract.'}]}]