Question: when did canada become fully independent from britain
[{'answer': '1982', 'provenance': [{'wikipedia_id': '285437', 'title': 'Canada Act 1982', 'start_paragraph_id': 0, 'start_character': 11, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '285437', 'title': 'Canada Act 1982', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 516, 'bleu_score': 0.761754878882775, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11767429459642078532}, 'section': 'Section::::Abstract.'}]}]