Question: who appoints the chief justice of the supreme court
[{'answer': 'nominated by the president', 'provenance': [{'wikipedia_id': '31739', 'title': 'Chief Justice of the United States', 'start_paragraph_id': 8, 'start_character': 47, 'end_paragraph_id': 8, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Origin, title, and appointment to office.\n'}]}, {'answer': 'confirmed by the Senate', 'provenance': [{'wikipedia_id': '31739', 'title': 'Chief Justice of the United States', 'start_paragraph_id': 11, 'start_character': 76, 'end_paragraph_id': 11, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Origin, title, and appointment to office.\n'}]}, {'provenance': [{'wikipedia_id': '31739', 'title': 'Chief Justice of the United States', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 1204, 'bleu_score': 0.9770487830978931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13707563833420159475}, 'section': 'Section::::Origin, title, and appointment to office.\n'}]}]