Question: when did it become mandatory to have a social security number
[{'answer': 'November 1935', 'provenance': [{'wikipedia_id': '22255742', 'title': 'Social Security number', 'start_paragraph_id': 4, 'start_character': 83, 'end_paragraph_id': 4, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '22255742', 'title': 'Social Security number', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 197, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4270697444089352480}, 'section': 'Section::::History.\n'}]}]