Question: what current member of the supreme court was once the solicitor general
[{'answer': 'Elena Kagan', 'provenance': [{'wikipedia_id': '105895', 'title': 'Solicitor General of the United States', 'start_paragraph_id': 8, 'start_character': 432, 'end_paragraph_id': 8, 'end_character': 443, 'bleu_score': 1.0, 'section': 'Section::::Significance.\n'}]}, {'provenance': [{'wikipedia_id': '105895', 'title': 'Solicitor General of the United States', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 1152, 'bleu_score': 0.9747285368209451, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16039717944821357231}, 'section': 'Section::::Significance.\n'}]}]