Question: who won the seven day battle civil war
[{'answer': 'Confederacy', 'provenance': [{'wikipedia_id': '998780', 'title': 'Seven Days Battles', 'start_paragraph_id': 54, 'start_character': 560, 'end_paragraph_id': 54, 'end_character': 571, 'bleu_score': 1.0, 'section': 'Section::::The Seven Days Battles.:Union withdrawal.\n'}]}]