Question: who sang the original version of stormy weather
[{'answer': 'Ethel Waters', 'provenance': [{'wikipedia_id': '76367', 'title': 'Stormy Weather (song)', 'start_paragraph_id': 1, 'start_character': 79, 'end_paragraph_id': 1, 'end_character': 91, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '76367', 'title': 'Stormy Weather (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 656, 'bleu_score': 0.983401048538667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9978994794251636375}, 'section': 'Section::::Abstract.'}]}]