Question: who did betty white play on mama's family
[{'answer': 'Ellen Jackson', 'provenance': [{'wikipedia_id': '35097425', 'title': "List of Mama's Family characters", 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Ellen Harper.\n'}]}, {'provenance': [{'wikipedia_id': '35097425', 'title': "List of Mama's Family characters", 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 172, 'bleu_score': 0.9321022168949711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 71219181938491645}, 'section': 'Section::::Ellen Harper.\n'}]}]