Question: who used the springfield rifle in the civil war
[{'answer': 'United States', 'provenance': [{'wikipedia_id': '1771645', 'title': 'Springfield Model 1861', 'start_paragraph_id': 1, 'start_character': 83, 'end_paragraph_id': 1, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Confederate States of America', 'provenance': [{'wikipedia_id': '1771645', 'title': 'Springfield Model 1861', 'start_paragraph_id': 20, 'start_character': 28, 'end_paragraph_id': 20, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::See also.\n'}]}]