Question: what are the ranks in the us navy
[{'answer': 'E-8s senior chief petty officer', 'provenance': [{'wikipedia_id': '548015', 'title': 'List of United States Navy enlisted rates', 'start_paragraph_id': 1, 'start_character': 802, 'end_paragraph_id': 1, 'end_character': 833, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'E-9s master chief petty officer', 'provenance': [{'wikipedia_id': '548015', 'title': 'List of United States Navy enlisted rates', 'start_paragraph_id': 1, 'start_character': 839, 'end_paragraph_id': 1, 'end_character': 870, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'E-7s are called chief petty officer'}, {'answer': 'E-1 through E-3 are known as Seamen'}, {'answer': 'E-4 through E-6 are called petty officers'}, {'provenance': [{'wikipedia_id': '548015', 'title': 'List of United States Navy enlisted rates', 'start_paragraph_id': 1, 'start_character': 14, 'end_paragraph_id': 1, 'end_character': 1102, 'bleu_score': 0.8147387601591831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5930483197962679180}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '548015', 'title': 'List of United States Navy enlisted rates', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5930483197962679180}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '548015', 'title': 'List of United States Navy enlisted rates', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['This enlisted numbering system is the same across all five branches of the U.S. military. All E-1 through E-3 are known as Seamen. E-4 through E-6 are called petty officers. All E-7s are called chief petty officer, E-8s senior chief petty officer, and E-9s master chief petty officer. Rates are displayed on a rating badge, which is a combination of rate and rating. E-2s and E-3s have color-coded group rate marks based on their career field. Personnel in pay grade E-1, since 1996, do not have an insignia to wear.', 'All E-7s are called chief petty officer, E-8s senior chief petty officer, and E-9s master chief petty officer. Rates are displayed on a rating badge, which is a combination of rate and rating', 'the most senior enlisted sailor ("E-9")']}}]}]