Question: what feature is found in the hill complex of the great zimbabwe
[{'answer': 'the Eastern Enclosure', 'provenance': [{'wikipedia_id': '177952', 'title': 'Great Zimbabwe', 'start_paragraph_id': 17, 'start_character': 412, 'end_paragraph_id': 17, 'end_character': 433, 'bleu_score': 1.0, 'section': 'Section::::Description.:Features of the ruins.\n'}]}, {'provenance': [{'wikipedia_id': '177952', 'title': 'Great Zimbabwe', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 911, 'bleu_score': 0.9161684649564421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7562616799009377973}, 'section': 'Section::::Description.:Features of the ruins.\n'}]}]