Question: when did the states ratify the 13th amendment
[{'answer': 'December 18 , 1865', 'provenance': [{'wikipedia_id': '31665', 'title': 'Thirteenth Amendment to the United States Constitution', 'start_paragraph_id': 60, 'start_character': 179, 'end_paragraph_id': 60, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::Proposal and ratification.:Ratification by the states.\n'}]}, {'provenance': [{'wikipedia_id': '31665', 'title': 'Thirteenth Amendment to the United States Constitution', 'start_paragraph_id': 60, 'start_character': 0, 'end_paragraph_id': 60, 'end_character': 595, 'bleu_score': 0.950027409461844, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12262837743255586527}, 'section': 'Section::::Proposal and ratification.:Ratification by the states.\n'}]}]