Question: when did china transition to a market economy
[{'answer': 'began in 1978'}, {'provenance': [{'wikipedia_id': '28178839', 'title': 'Chinese economic reform', 'start_paragraph_id': 3, 'start_character': 32, 'end_paragraph_id': 3, 'end_character': 999, 'bleu_score': 0.8783850327305751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17602525159048726748}, 'section': 'Section::::Abstract.'}]}]