Question: who put the one child policy in place
[{'answer': 'Song Jian', 'provenance': [{'wikipedia_id': '44664', 'title': 'One-child policy', 'start_paragraph_id': 8, 'start_character': 197, 'end_paragraph_id': 8, 'end_character': 206, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}]