Question: who was the us president that declared war on britain in 1812
[{'answer': 'President James Madison', 'provenance': [{'wikipedia_id': '34059', 'title': 'War of 1812', 'start_paragraph_id': 2, 'start_character': 1027, 'end_paragraph_id': 2, 'end_character': 1050, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34059', 'title': 'War of 1812', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 870, 'bleu_score': 0.569773442559098, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14450209616066613008}, 'section': 'Section::::Abstract.'}]}]