Question: when did the us adopt the gregorian calendar
[{'answer': '1752', 'provenance': [{'wikipedia_id': '23306251', 'title': 'Gregorian calendar', 'start_paragraph_id': 33, 'start_character': 127, 'end_paragraph_id': 33, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Gregorian reform.:Adoption.\n'}]}]