Question: what is the equivalent of ssn in uk
[{'answer': 'National Insurance number', 'provenance': [{'wikipedia_id': '2333711', 'title': 'National Insurance number', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2333711', 'title': 'National Insurance number', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 286, 'bleu_score': 0.959574895300321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5110609346223885307}, 'section': 'Section::::Abstract.'}]}]