Question: who plays adele webber on grey's anatomy
[{'answer': 'Loretta Devine', 'provenance': [{'wikipedia_id': '1279759', 'title': 'Loretta Devine', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1279759', 'title': 'Loretta Devine', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 762, 'bleu_score': 0.847141485323038, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6223860501334753962}, 'section': 'Section::::Abstract.'}]}]