Question: when did lego come to the united states
[{'answer': '1961', 'provenance': [{'wikipedia_id': '1390380', 'title': 'Lego timeline', 'start_paragraph_id': 59, 'start_character': 12, 'end_paragraph_id': 59, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::1960s.\n'}]}]