Question: when was the 13th amendment ratified by the states
[{'answer': 'December 6 , 1865', 'provenance': [{'wikipedia_id': '31665', 'title': 'Thirteenth Amendment to the United States Constitution', 'start_paragraph_id': 32, 'start_character': 60, 'end_paragraph_id': 32, 'end_character': 77, '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': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 513, 'bleu_score': 0.976043556018343, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1285058301361003939}, 'section': 'Section::::Abstract.'}]}]