Question: who won the seven days battle union or confederate
[{'answer': 'Confederate', 'provenance': [{'wikipedia_id': '998780', 'title': 'Seven Days Battles', 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 167, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]