Question: when did bangladesh become part of the british empire
[{'answer': '1757', 'provenance': [{'wikipedia_id': '40096', 'title': 'History of Bangladesh', 'start_paragraph_id': 5, 'start_character': 250, 'end_paragraph_id': 5, 'end_character': 254, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]