Question: which flag is canada's official royal flag
[{'answer': 'flag of Canada', 'provenance': [{'wikipedia_id': '97066', 'title': 'Flag of Canada', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '97066', 'title': 'Flag of Canada', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 429, 'bleu_score': 0.726537670954649, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 635132977369492965}, 'section': 'Section::::Abstract.'}]}]