Question: when did dvds come out in the us
[{'answer': 'March 26 , 1997', 'provenance': [{'wikipedia_id': '172809', 'title': 'DVD player', 'start_paragraph_id': 2, 'start_character': 525, 'end_paragraph_id': 2, 'end_character': 544, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '172809', 'title': 'DVD player', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 617, 'bleu_score': 0.9802931511945101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10214852400765182024}, 'section': 'Section::::Abstract.'}]}]