Question: which chinese dynasty did the most work on the great wall
[{'answer': 'the Ming', 'provenance': [{'wikipedia_id': '34476548', 'title': 'History of the Great Wall of China', 'start_paragraph_id': 2, 'start_character': 172, 'end_paragraph_id': 2, 'end_character': 180, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34476548', 'title': 'History of the Great Wall of China', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 706, 'bleu_score': 0.6714022390740241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17927735444759199032}, 'section': 'Section::::Abstract.'}]}]