Question: how many 5 star general in us history
[{'answer': 'Nine', 'provenance': [{'wikipedia_id': '6888786', 'title': 'Five-star rank', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::U.S. five-star ranks.\n'}]}, {'provenance': [{'wikipedia_id': '6888786', 'title': 'Five-star rank', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 468, 'bleu_score': 0.9572799132941561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13577977790704448435}, 'section': 'Section::::U.S. five-star ranks.\n'}]}]