Question: how many judges are there in the united states supreme court
[{'answer': 'six', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 8, 'start_character': 150, 'end_paragraph_id': 8, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 546, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6849950751447619542}, 'section': 'Section::::Composition.:Size of the court.\n'}]}]