Question: what type of government did the constitution establish for the united states
[{'answer': 'Constitutional Republic'}, {'answer': 'Federation', 'provenance': [{'wikipedia_id': '31644', 'title': 'Constitution of the United States', 'start_paragraph_id': 8, 'start_character': 38, 'end_paragraph_id': 8, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Background.:First government.\n'}]}]