Question: when did china remove the one child policy
[{'answer': 'October 2015', 'provenance': [{'wikipedia_id': '44664', 'title': 'One-child policy', 'start_paragraph_id': 27, 'start_character': 3, 'end_paragraph_id': 27, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::History.:Abolition.\n'}]}]