Question: what do first 3 numbers of ssn mean
[{'answer': 'Area Number', 'provenance': [{'wikipedia_id': '22255742', 'title': 'Social Security number', 'start_paragraph_id': 74, 'start_character': 35, 'end_paragraph_id': 74, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::SSNs used in advertising.\n'}]}, {'provenance': [{'wikipedia_id': '22255742', 'title': 'Social Security number', 'start_paragraph_id': 76, 'start_character': 156, 'end_paragraph_id': 76, 'end_character': 372, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18076850352939397527}, 'section': 'Section::::List of Social Security Area Numbers.\n'}]}]