Question: who declared war to start the civil war
[{'answer': 'Confederates', 'provenance': [{'wikipedia_id': '863', 'title': 'American Civil War', 'start_paragraph_id': 7, 'start_character': 772, 'end_paragraph_id': 7, 'end_character': 784, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}]