Question: when was the first curry house opened in britain
[{'answer': '1810', 'provenance': [{'wikipedia_id': '1548541', 'title': 'Sake Dean Mahomed', 'start_paragraph_id': 9, 'start_character': 3, 'end_paragraph_id': 9, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Restaurant venture.\n'}]}, {'provenance': [{'wikipedia_id': '1548541', 'title': 'Sake Dean Mahomed', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 426, 'bleu_score': 0.7637742476439491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14063748831892999545}, 'section': 'Section::::Restaurant venture.\n'}]}]