Question: which branch of the us government does the supreme court lead
[{'answer': 'judicial', 'provenance': [{'wikipedia_id': '31739', 'title': 'Chief Justice of the United States', 'start_paragraph_id': 3, 'start_character': 86, 'end_paragraph_id': 3, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]