Question: when did the british take control of hong kong
[{'answer': '1841', 'provenance': [{'wikipedia_id': '27413692', 'title': 'British Hong Kong', 'start_paragraph_id': 1, 'start_character': 178, 'end_paragraph_id': 1, 'end_character': 182, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27413692', 'title': 'British Hong Kong', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 725, 'bleu_score': 0.5417515612067261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4671028454532724552}, 'section': 'Section::::Abstract.'}]}]