Question: what form of goverment does the united states have
[{'answer': 'federal republic', 'provenance': [{'wikipedia_id': '195149', 'title': 'Federal government of the United States', 'start_paragraph_id': 1, 'start_character': 121, 'end_paragraph_id': 1, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '195149', 'title': 'Federal government of the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 656, 'bleu_score': 0.8722604825177761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9981949500445109776}, 'section': 'Section::::Abstract.'}]}]