Question: which country's flag is called union jack
[{'answer': 'the United Kingdom', 'provenance': [{'wikipedia_id': '70760', 'title': 'Union Jack', 'start_paragraph_id': 1, 'start_character': 55, 'end_paragraph_id': 1, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '70760', 'title': 'Union Jack', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 496, 'bleu_score': 0.7020608432586231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16955314480873674522}, 'section': 'Section::::Abstract.'}]}]