Question: how many planes are in the canadian air force
[{'answer': '391', 'provenance': [{'wikipedia_id': '931406', 'title': 'Royal Canadian Air Force', 'start_paragraph_id': 22, 'start_character': 39, 'end_paragraph_id': 22, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Aircraft.\n'}]}, {'provenance': [{'wikipedia_id': '931406', 'title': 'Royal Canadian Air Force', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 245, 'bleu_score': 0.8034512038068881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 431097234058203209}, 'section': 'Section::::Aircraft.\n'}]}]