Question: when did hong kong cease to be a british colony
[{'answer': '1997', 'provenance': [{'wikipedia_id': '27413692', 'title': 'British Hong Kong', 'start_paragraph_id': 1, 'start_character': 328, 'end_paragraph_id': 1, 'end_character': 332, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]