Question: what comes after captain in the air force
[{'answer': 'Major', 'provenance': [{'wikipedia_id': '552057', 'title': 'United States Air Force officer rank insignia', 'start_paragraph_id': 4, 'start_character': 580, 'end_paragraph_id': 4, 'end_character': 585, 'bleu_score': 1.0, 'section': 'Section::::Current insignia.\n'}]}]