Question: who was the president when the national anthem was written
[{'answer': 'President James Madison', 'provenance': [{'wikipedia_id': '31064', 'title': 'The Star-Spangled Banner', 'start_paragraph_id': 7, 'start_character': 230, 'end_paragraph_id': 7, 'end_character': 253, 'bleu_score': 1.0, 'section': "Section::::Early history.:Francis Scott Key's lyrics.\n"}]}, {'provenance': [{'wikipedia_id': '31064', 'title': 'The Star-Spangled Banner', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 935, 'bleu_score': 0.9872197907830691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13213510072015903619}, 'section': "Section::::Early history.:Francis Scott Key's lyrics.\n"}]}]