Question: what is the democracy of the united states
[{'answer': 'federal republic', 'provenance': [{'wikipedia_id': '32021', 'title': 'Politics of the United States', 'start_paragraph_id': 1, 'start_character': 23, 'end_paragraph_id': 1, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32021', 'title': 'Politics of the United States', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8189771882539049258}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32021', 'title': 'Politics of the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 241, 'bleu_score': 0.943604326170661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8189771882539049258}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32021', 'title': 'Politics of the United States', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The United States is a federal republic in which the president, Congress and federal courts share powers reserved to the national government, according to its Constitution.', 'The United States is a federal republic in which the president, Congress and federal courts share powers reserved to the national government, according to its Constitution.', 'The United States is a federal republic in which the president, Congress and federal courts share powers reserved to the national government, according to its Constitution. The federal government shares sovereignty with the state governments.']}}]}]