Question: what is the source of two china's great rivers
[{'answer': 'Jari Hill', 'provenance': [{'wikipedia_id': '6613', 'title': 'Yangtze', 'start_paragraph_id': 28, 'start_character': 540, 'end_paragraph_id': 28, 'end_character': 549, 'bleu_score': 1.0, 'section': 'Section::::Geography.\n'}]}, {'provenance': [{'wikipedia_id': '6613', 'title': 'Yangtze', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 982, 'bleu_score': 0.7349221891434871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13493883391764863257}, 'section': 'Section::::Geography.\n'}]}]