Question: when were the confederate states of america formed
[{'answer': 'February 1861', 'provenance': [{'wikipedia_id': '7023', 'title': 'Confederate States of America', 'start_paragraph_id': 2, 'start_character': 85, 'end_paragraph_id': 2, 'end_character': 98, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7023', 'title': 'Confederate States of America', 'start_paragraph_id': 10, 'start_character': 186, 'end_paragraph_id': 10, 'end_character': 672, 'bleu_score': 0.675689383757142, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17106338779585100349}, 'section': 'Section::::History.\n'}]}]