Question: when did the us constitution come into force
[{'answer': '1789', 'provenance': [{'wikipedia_id': '31644', 'title': 'Constitution of the United States', 'start_paragraph_id': 2, 'start_character': 42, 'end_paragraph_id': 2, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31644', 'title': 'Constitution of the United States', 'start_paragraph_id': 2, 'start_character': 6, 'end_paragraph_id': 2, 'end_character': 805, 'bleu_score': 0.8174480167502771, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7505496290164166731}, 'section': 'Section::::Abstract.'}]}]