Question: what kind of planes does spirit airlines fly
[{'answer': 'Airbus A320 family aircraft', 'provenance': [{'wikipedia_id': '446433', 'title': 'Spirit Airlines', 'start_paragraph_id': 41, 'start_character': 49, 'end_paragraph_id': 41, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Fleet.:Current fleet.\n'}]}, {'provenance': [{'wikipedia_id': '446433', 'title': 'Spirit Airlines', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 76, 'bleu_score': 0.610216920255791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7472820997553856310}, 'section': 'Section::::Fleet.:Current fleet.\n'}]}]