Question: who can certify documents in the united states
[{'answer': 'notary public', 'provenance': [{'wikipedia_id': '3425066', 'title': 'Certified copy', 'start_paragraph_id': 3, 'start_character': 162, 'end_paragraph_id': 3, 'end_character': 175, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3425066', 'title': 'Certified copy', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 232, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9603345575704853522}, 'section': 'Section::::Abstract.'}]}]