Question: when did the united states declare war on great britain
[{'answer': 'June 18 , 1812', 'provenance': [{'wikipedia_id': '34059', 'title': 'War of 1812', 'start_paragraph_id': 46, 'start_character': 438, 'end_paragraph_id': 46, 'end_character': 452, 'bleu_score': 1.0, 'section': 'Section::::Declaration of war.\n'}]}, {'provenance': [{'wikipedia_id': '34059', 'title': 'War of 1812', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 870, 'bleu_score': 0.6569726124735981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17787434013107955752}, 'section': 'Section::::Abstract.'}]}]