Question: when did little house on the prairie come out
[{'answer': 'September 11 , 1974', 'provenance': [{'wikipedia_id': '521317', 'title': 'Little House on the Prairie (TV series)', 'start_paragraph_id': 2, 'start_character': 139, 'end_paragraph_id': 2, 'end_character': 158, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]