Question: when did canada become part of the british commonwealth
[{'answer': '1763', 'provenance': [{'wikipedia_id': '5075309', 'title': 'Canada under British rule', 'start_paragraph_id': 1, 'start_character': 49, 'end_paragraph_id': 1, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]