Question: how many stock exchanges are there in china
[{'answer': 'two', 'provenance': [{'wikipedia_id': '19927468', 'title': 'Chinese stock exchanges', 'start_paragraph_id': 1, 'start_character': 41, 'end_paragraph_id': 1, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19927468', 'title': 'Chinese stock exchanges', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 83, 'bleu_score': 0.861173529963367, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6407459469145024573}, 'section': 'Section::::Abstract.'}]}]