Question: when did they stop foot binding in china
[{'answer': 'the early 20th century', 'provenance': [{'wikipedia_id': '176760', 'title': 'Foot binding', 'start_paragraph_id': 1, 'start_character': 451, 'end_paragraph_id': 1, 'end_character': 473, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]