Question: who operated the national combined dna index system
[{'answer': 'the Federal Bureau of Investigation', 'provenance': [{'wikipedia_id': '30870527', 'title': 'Combined DNA Index System', 'start_paragraph_id': 1, 'start_character': 107, 'end_paragraph_id': 1, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30870527', 'title': 'Combined DNA Index System', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 453, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5318103628181231324}, 'section': 'Section::::Abstract.'}]}]