Question: when was dna first used in a criminal case
[{'answer': '1986', 'provenance': [{'wikipedia_id': '44290', 'title': 'DNA profiling', 'start_paragraph_id': 5, 'start_character': 270, 'end_paragraph_id': 5, 'end_character': 274, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '44290', 'title': 'DNA profiling', 'start_paragraph_id': 108, 'start_character': 0, 'end_paragraph_id': 108, 'end_character': 465, 'bleu_score': 0.9731482306711111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9970568364002592263}, 'section': 'Section::::DNA evidence in criminal trials.:Cases.\n'}]}]