Question: who did us fight in world war 1
[{'answer': 'Germany', 'provenance': [{'wikipedia_id': '25604889', 'title': 'United States in World War I', 'start_paragraph_id': 1, 'start_character': 34, 'end_paragraph_id': 1, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Austria - Hungary', 'provenance': [{'wikipedia_id': '25604889', 'title': 'United States in World War I', 'start_paragraph_id': 7, 'start_character': 1098, 'end_paragraph_id': 7, 'end_character': 1114, 'bleu_score': 1.0, 'section': 'Section::::Entry.\n'}]}, {'provenance': [{'wikipedia_id': '25604889', 'title': 'United States in World War I', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 1187, 'bleu_score': 0.97632420608221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16962302495615626160}, 'section': 'Section::::Entry.\n'}]}, {'provenance': [{'wikipedia_id': '25604889', 'title': 'United States in World War I', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 320, 'bleu_score': 0.8644058844939351, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16962302495615626160}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25604889', 'title': 'United States in World War I', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16962302495615626160}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4077967', 'title': 'History of Germany during World War I', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Austria-Hungary.', "During World War I, the German Empire was one of the Central Powers that lost the war. It began participation in the conflict after the declaration of war against Serbia by its ally, Austria-Hungary. German forces fought the Allies on both the eastern and western fronts, although German territory itself remained relatively safe from widespread invasion for most of the war, except for a brief period in 1914 when East Prussia was invaded. A tight blockade imposed by the Royal Navy caused severe food shortages in the cities, especially in the winter of 191617, known as the Turnip Winter. At the end of the war, Germany's defeat and widespread popular discontent triggered the German Revolution of 191819 which overthrew the monarchy and established the Weimar Republic.\rhighlight sentence(s) containing evidence, not only the answer"]}}]}, {'provenance': [{'wikipedia_id': '25162935', 'title': 'American entry into World War I', 'section': 'Section::::Preparedness movement.\n', 'start_paragraph_id': 65, 'end_paragraph_id': 65, 'meta': {'evidence_span': ['The Preparedness movement had a "realistic" philosophy of world affairsthey believed that economic strength and military muscle were more decisive than idealistic crusades focused on causes like democracy and national self-determination.', 'The Preparedness movement had a "realistic" philosophy of world affairsthey believed that economic strength and military muscle were more decisive than idealistic crusades focused on causes like democracy and national self-determination. Emphasizing over and over the weak state of national defenses, they showed that America\'s 100,000-man Army even augmented by the 112,000 National Guardsmen, was outnumbered 20 to one by Germany\'s army, which was drawn from a smaller population. Similarly in 1915, the armed forces of Great Britain and the British empire (the world\'s most powerful military and economic power at the time), France, Russia, the Austro-Hungarian empire, Ottoman empire, Italy, Bulgaria, Romania, Serbia, Belgium, Japan and Greece were all larger and more experienced than the United States military, in many cases significantly so.\rhighlight sentence(s) containing evidence, not only the answer']}}]}, {'provenance': [{'wikipedia_id': '25604889', 'title': 'United States in World War I', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Germany', 'The United States declared war on Germany on April 6, 1917, more than two and a half years after World War I started. A ceasefire and Armistice was declared on November 11, 1918. Before entering the war, the U.S. had remained neutral, though it had been an important supplier to Great Britain and the other Allied powers.\rhighlight sentence(s) containing evidence, not only the answer']}}]}]