Question: what are the giant cactus called in arizona
[{'answer': 'saguaro', 'provenance': [{'wikipedia_id': '18952895', 'title': 'Saguaro', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18952895', 'title': 'Saguaro', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 521, 'bleu_score': 0.86160481938651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9480529831681491937}, 'section': 'Section::::Abstract.'}]}]