Question: when were miscegenation laws ruled unconstitutional by the us supreme court
[{'answer': '1967', 'provenance': [{'wikipedia_id': '31646377', 'title': 'Anti-miscegenation laws in the United States', 'start_paragraph_id': 2, 'start_character': 162, 'end_paragraph_id': 2, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31646377', 'title': 'Anti-miscegenation laws in the United States', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 659, 'bleu_score': 0.9718278359086201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11534940942687340743}, 'section': 'Section::::Abstract.'}]}]