Question: when did canada become independent of the british empire
[{'answer': 'April 17 , 1982', 'provenance': [{'wikipedia_id': '52477', 'title': 'History of Canada', 'start_paragraph_id': 111, 'start_character': 637, 'end_paragraph_id': 111, 'end_character': 652, 'bleu_score': 1.0, 'section': 'Section::::1982–1992.\n'}]}, {'provenance': [{'wikipedia_id': '52477', 'title': 'History of Canada', 'start_paragraph_id': 111, 'start_character': 0, 'end_paragraph_id': 111, 'end_character': 1252, 'bleu_score': 0.990171692033262, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1634896542831008102}, 'section': 'Section::::1982–1992.\n'}]}]