Question: what is the rank of admiral in the navy
[{'answer': 'the highest possible', 'provenance': [{'wikipedia_id': '668052', 'title': 'Admiral of the Navy (United States)', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '668052', 'title': 'Admiral of the Navy (United States)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 177, 'bleu_score': 0.50260716472471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15850775204579257334}, 'section': 'Section::::Abstract.'}]}]