Question: when was bangladesh created as an independent country
[{'answer': '1971', 'provenance': [{'wikipedia_id': '40096', 'title': 'History of Bangladesh', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40096', 'title': 'History of Bangladesh', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 0.8758676365521061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1896021224619951619}, 'section': 'Section::::Abstract.'}]}]