Question: who played mary on the little house on the prairie
[{'answer': 'Melissa Sue Anderson', 'provenance': [{'wikipedia_id': '36909', 'title': 'Melissa Sue Anderson', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36909', 'title': 'Melissa Sue Anderson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 274, 'bleu_score': 0.786110823517253, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11938932432193580702}, 'section': 'Section::::Abstract.'}]}]