Question: when did bargain town become toys r us
[{'answer': '1966', 'provenance': [{'wikipedia_id': '509306', 'title': 'Toys "R" Us', 'start_paragraph_id': 7, 'start_character': 384, 'end_paragraph_id': 7, 'end_character': 388, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]