Question: when did the social security act become law
[{'answer': '1935', 'provenance': [{'wikipedia_id': '48728', 'title': 'Social Security (United States)', 'start_paragraph_id': 1, 'start_character': 291, 'end_paragraph_id': 1, 'end_character': 295, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48728', 'title': 'Social Security (United States)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 409, 'bleu_score': 0.9434724611166201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4656081414860542707}, 'section': 'Section::::Abstract.'}]}]