Question: when did us declare war on germany in ww1
[{'answer': 'April 6', 'provenance': [{'wikipedia_id': '28040759', 'title': 'United States declaration of war on Germany (1917)', 'start_paragraph_id': 1, 'start_character': 198, 'end_paragraph_id': 1, 'end_character': 205, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1917', 'provenance': [{'wikipedia_id': '28040759', 'title': 'United States declaration of war on Germany (1917)', 'start_paragraph_id': 0, 'start_character': 45, 'end_paragraph_id': 0, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28040759', 'title': 'United States declaration of war on Germany (1917)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 205, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14441302470174738268}, 'section': 'Section::::Abstract.'}]}]