Question: when did hong kong became independent from britain
[{'answer': '1 July 1997', 'provenance': [{'wikipedia_id': '13404', 'title': 'Hong Kong', 'start_paragraph_id': 13, 'start_character': 755, 'end_paragraph_id': 13, 'end_character': 766, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]