Question: height of great wall of china in meters
[{'answer': '5 to 8 m'}, {'provenance': [{'wikipedia_id': '5094570', 'title': 'Great Wall of China', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 608, 'bleu_score': 0.635514255465034, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3833723631065848884}, 'section': 'Section::::Course.:Ming Great Wall.\n'}]}]