Question: when did toys r us first come out
[{'answer': '1957', 'provenance': [{'wikipedia_id': '509306', 'title': 'Toys "R" Us', 'start_paragraph_id': 2, 'start_character': 59, 'end_paragraph_id': 2, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '509306', 'title': 'Toys "R" Us', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 431, 'bleu_score': 0.9738505480425671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14333758348713922687}, 'section': 'Section::::Abstract.'}]}]