Question: who won the battle of appomattox in the civil war
[{'answer': 'the United States', 'provenance': [{'wikipedia_id': '1478485', 'title': 'Battle of Appomattox Court House', 'start_paragraph_id': 1, 'start_character': 374, 'end_paragraph_id': 1, 'end_character': 391, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1478485', 'title': 'Battle of Appomattox Court House', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1192, 'bleu_score': 0.9348222808740211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 847452155051897249}, 'section': 'Section::::Abstract.'}]}]