Question: how many passengers does an airbus a321 hold
[{'answer': '236', 'provenance': [{'wikipedia_id': '164938', 'title': 'Airbus A321', 'start_paragraph_id': 2, 'start_character': 364, 'end_paragraph_id': 2, 'end_character': 367, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]