Question: who designed the flag of the army of northern virginia
[{'answer': 'General P.G.T. Beauregard', 'provenance': [{'wikipedia_id': '58155', 'title': 'Army of Northern Virginia', 'start_paragraph_id': 7, 'start_character': 57, 'end_paragraph_id': 7, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Command under Brigadier General P. G. T. Beauregard.\n'}]}, {'provenance': [{'wikipedia_id': '58155', 'title': 'Army of Northern Virginia', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 925, 'bleu_score': 0.9550554505511221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15608097903852222358}, 'section': 'Section::::Command under Brigadier General P. G. T. Beauregard.\n'}]}]