Question: where is walnut grove in little house on the prairie
[{'answer': 'Minnesota', 'provenance': [{'wikipedia_id': '195705', 'title': 'Little House on the Prairie', 'start_paragraph_id': 1, 'start_character': 183, 'end_paragraph_id': 1, 'end_character': 192, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]