Question: when did united states enter world war i
[{'answer': 'April 1917', 'provenance': [{'wikipedia_id': '25162935', 'title': 'American entry into World War I', 'start_paragraph_id': 1, 'start_character': 44, 'end_paragraph_id': 1, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25162935', 'title': 'American entry into World War I', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 685, 'bleu_score': 0.699541673772138, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14442352296137670345}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25162935', 'title': 'American entry into World War I', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['April 1917,', 'The American entry into World War I came in April 1917, after more than two and a half years of efforts by President Woodrow Wilson to keep the United States out of the war.', 'The American entry into World War I came in April 1917']}}]}, {'provenance': [{'wikipedia_id': '31780701', 'title': 'United States Navy operations during World War I', 'section': 'Section::::Operations.:Atlantic Ocean.\n', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['April 6, 1917', 'Congress declared war on April 6, 1917, which meant the United States Coast Guard automatically became a part of the Department of the Navy.', 'Congress declared war on April 6, 1917, which meant the United States Coast Guard automatically became a part of the Department of the Navy. Destroyers and similar escort warships were']}}]}]