Question: who played the mom in everybody loves raymond
[{'answer': 'Roberts', 'provenance': [{'wikipedia_id': '361885', 'title': 'Doris Roberts', 'start_paragraph_id': 0, 'start_character': 6, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]