Question: who won the battle of bentonville civil war
[{'answer': 'Union', 'provenance': [{'wikipedia_id': '26122909', 'title': 'Battle of Bentonville', 'start_paragraph_id': 1, 'start_character': 231, 'end_paragraph_id': 1, 'end_character': 236, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26122909', 'title': 'Battle of Bentonville', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 324, 'bleu_score': 0.963949056609222, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1785093568056213910}, 'section': 'Section::::Abstract.'}]}]