Question: when did the south secede from the united states
[{'answer': 'the years 1860 and 1861', 'provenance': [{'wikipedia_id': '17832214', 'title': 'Secession in the United States', 'start_paragraph_id': 3, 'start_character': 54, 'end_paragraph_id': 3, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17832214', 'title': 'Secession in the United States', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 326, 'bleu_score': 0.9632870032952191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13240076027277942391}, 'section': 'Section::::Abstract.'}]}]