Question: when did canada stop flying the union jack
[{'answer': '1965', 'provenance': [{'wikipedia_id': '97066', 'title': 'Flag of Canada', 'start_paragraph_id': 2, 'start_character': 401, 'end_paragraph_id': 2, 'end_character': 405, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '97066', 'title': 'Flag of Canada', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 710, 'bleu_score': 0.8545658349598421, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12885716503275459716}, 'section': 'Section::::History.:Early flags.\n'}]}]