Question: name the largest national park in east africa
[{'answer': 'Ruaha National Park', 'provenance': [{'wikipedia_id': '1667378', 'title': 'Ruaha National Park', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1667378', 'title': 'Ruaha National Park', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 235, 'bleu_score': 0.7988335681808141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6829560144594268159}, 'section': 'Section::::Abstract.'}]}]