Question: when was hong kong taken by the british
[{'answer': '1842', 'provenance': [{'wikipedia_id': '27413692', 'title': 'British Hong Kong', 'start_paragraph_id': 1, 'start_character': 504, 'end_paragraph_id': 1, 'end_character': 508, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]