Question: how many c-5 does the air force have
[{'answer': '52', 'provenance': [{'wikipedia_id': '160434', 'title': 'Lockheed C-5 Galaxy', 'start_paragraph_id': 10, 'start_character': 632, 'end_paragraph_id': 10, 'end_character': 634, 'bleu_score': 1.0, 'section': 'Section::::Development.:Into production.\n'}]}]