Question: when did the i 9 form became a requirement
[{'answer': 'November 6 , 1986', 'provenance': [{'wikipedia_id': '6017192', 'title': 'Form I-9', 'start_paragraph_id': 4, 'start_character': 27, 'end_paragraph_id': 4, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Requirements.\n'}]}, {'provenance': [{'wikipedia_id': '6017192', 'title': 'Form I-9', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 362, 'bleu_score': 0.9128479730518221, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 84163876895383601}, 'section': 'Section::::Requirements.\n'}]}]