Question: when was affirmative action voted down in michigan
[{'answer': 'December 22 , 2006', 'provenance': [{'wikipedia_id': '4156767', 'title': 'Michigan Civil Rights Initiative', 'start_paragraph_id': 1, 'start_character': 341, 'end_paragraph_id': 1, 'end_character': 359, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4156767', 'title': 'Michigan Civil Rights Initiative', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 780, 'bleu_score': 0.983401048538667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4277187463024458143}, 'section': 'Section::::Abstract.'}]}]