Question: when did south carolina come back to the union
[{'answer': 'July 9 , 1868', 'provenance': [{'wikipedia_id': '6696464', 'title': 'South Carolina in the American Civil War', 'start_paragraph_id': 67, 'start_character': 278, 'end_paragraph_id': 67, 'end_character': 291, 'bleu_score': 1.0, 'section': 'Section::::Restoration to Union.\n'}]}]