Question: when did the american flag come into existence
[{'answer': 'June 14 , 1777', 'provenance': [{'wikipedia_id': '11447', 'title': 'Flag of the United States', 'start_paragraph_id': 11, 'start_character': 3, 'end_paragraph_id': 11, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::History.:Flag Resolution of 1777.\n'}]}, {'provenance': [{'wikipedia_id': '11447', 'title': 'Flag of the United States', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 493, 'bleu_score': 0.9757530668325981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12190022458840412916}, 'section': 'Section::::History.:Flag Resolution of 1777.\n'}]}]