Question: which are the seven natural wonders of the world
[{'answer': 'Aurora Borealis'}, {'answer': 'Harbor of Rio de Janeiro'}, {'answer': 'Grand Canyon', 'provenance': [{'wikipedia_id': '22780566', 'title': 'Seven Natural Wonders (CNN)', 'start_paragraph_id': 6, 'start_character': 12, 'end_paragraph_id': 6, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Great Barrier Reef , Australia'}, {'answer': 'Mount Everest', 'provenance': [{'wikipedia_id': '22780566', 'title': 'Seven Natural Wonders (CNN)', 'start_paragraph_id': 8, 'start_character': 12, 'end_paragraph_id': 8, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Paricutin'}, {'answer': 'Victoria Falls', 'provenance': [{'wikipedia_id': '22780566', 'title': 'Seven Natural Wonders (CNN)', 'start_paragraph_id': 10, 'start_character': 12, 'end_paragraph_id': 10, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]