Question: when did the apple iphone 4s come out
[{'answer': 'October 14 , 2011', 'provenance': [{'wikipedia_id': '31884571', 'title': 'IPhone 4S', 'start_paragraph_id': 2, 'start_character': 96, 'end_paragraph_id': 2, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31884571', 'title': 'IPhone 4S', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 509, 'bleu_score': 0.9757530668325981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2385731258220768926}, 'section': 'Section::::Abstract.'}]}]