Question: when did the first nintendo system come out
[{'answer': '1974', 'provenance': [{'wikipedia_id': '21197', 'title': 'Nintendo', 'start_paragraph_id': 5, 'start_character': 16, 'end_paragraph_id': 5, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::History.:1889–1956: As a card company.\n'}]}, {'provenance': [{'wikipedia_id': '21197', 'title': 'Nintendo', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 407, 'bleu_score': 0.9338603241255111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15268599525649107871}, 'section': 'Section::::History.:1974–1978: Early electronic era.\n'}]}]