Question: who are the current supreme court justices 2017
[{'answer': 'John Roberts', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 43, 'start_character': 491, 'end_paragraph_id': 43, 'end_character': 503, 'bleu_score': 1.0, 'section': 'Section::::Composition.:Tenure.\n'}]}, {'answer': 'Anthony Kennedy', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 58, 'start_character': 114, 'end_paragraph_id': 58, 'end_character': 129, 'bleu_score': 1.0, 'section': 'Section::::Membership.:Retired justices.\n'}]}, {'answer': 'Clarence Thomas', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 47, 'start_character': 141, 'end_paragraph_id': 47, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Membership.:Current justices.\n'}]}, {'answer': 'Ruth Bader Ginsburg', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 55, 'start_character': 315, 'end_paragraph_id': 55, 'end_character': 334, 'bleu_score': 1.0, 'section': 'Section::::Membership.:Court demographics.\n'}]}, {'answer': 'Stephen Breyer', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 43, 'start_character': 407, 'end_paragraph_id': 43, 'end_character': 421, 'bleu_score': 1.0, 'section': 'Section::::Composition.:Tenure.\n'}]}, {'answer': 'Samuel Alito', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 140, 'start_character': 199, 'end_paragraph_id': 140, 'end_character': 211, 'bleu_score': 1.0, 'section': 'Section::::Law clerks.\n'}]}, {'answer': 'Sonia Sotomayor', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 55, 'start_character': 403, 'end_paragraph_id': 55, 'end_character': 418, 'bleu_score': 1.0, 'section': 'Section::::Membership.:Court demographics.\n'}]}, {'answer': 'Elena Kagan', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 55, 'start_character': 474, 'end_paragraph_id': 55, 'end_character': 485, 'bleu_score': 1.0, 'section': 'Section::::Membership.:Court demographics.\n'}]}, {'answer': 'Neil Gorsuch', 'provenance': [{'wikipedia_id': '31737', 'title': 'Supreme Court of the United States', 'start_paragraph_id': 33, 'start_character': 515, 'end_paragraph_id': 33, 'end_character': 527, 'bleu_score': 1.0, 'section': 'Section::::Composition.:Appointment and confirmation.\n'}]}]