Question: who led chinas naval exploration during the age of exploration
[{'answer': 'Zheng He', 'provenance': [{'wikipedia_id': '34494', 'title': 'Zheng He', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34494', 'title': 'Zheng He', 'start_paragraph_id': 1, 'start_character': 6, 'end_paragraph_id': 1, 'end_character': 518, 'bleu_score': 0.8251181764981751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5212250822237200360}, 'section': 'Section::::Abstract.'}]}]