Question: when did windows vista come out in us
[{'answer': '30 January 2007'}, {'provenance': [{'wikipedia_id': '2289648', 'title': 'Windows Vista', 'start_paragraph_id': 1, 'start_character': 8, 'end_paragraph_id': 1, 'end_character': 807, 'bleu_score': 0.8030148863894191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7151170481490246425}, 'section': 'Section::::Abstract.'}]}]