Question: how many casualties died in the battle of fort sumter
[{'answer': '0', 'provenance': [{'wikipedia_id': '339819', 'title': 'Battle of Fort Sumter', 'start_paragraph_id': 1, 'start_character': 327, 'end_paragraph_id': 1, 'end_character': 328, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]