Question: where was the 50 star flag first flown
[{'answer': 'Fort McHenry', 'provenance': [{'wikipedia_id': '11447', 'title': 'Flag of the United States', 'start_paragraph_id': 61, 'start_character': 700, 'end_paragraph_id': 61, 'end_character': 712, 'bleu_score': 1.0, 'section': 'Section::::Design.:49- and 50-star unions.\n'}]}, {'provenance': [{'wikipedia_id': '11447', 'title': 'Flag of the United States', 'start_paragraph_id': 61, 'start_character': 0, 'end_paragraph_id': 61, 'end_character': 763, 'bleu_score': 0.934257857859163, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1473925746905785862}, 'section': 'Section::::Design.:49- and 50-star unions.\n'}]}]