Question: when did freddie mac and fannie mae fail
[{'answer': 'September 2008', 'provenance': [{'wikipedia_id': '19223988', 'title': 'Federal takeover of Fannie Mae and Freddie Mac', 'start_paragraph_id': 1, 'start_character': 267, 'end_paragraph_id': 1, 'end_character': 281, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19223988', 'title': 'Federal takeover of Fannie Mae and Freddie Mac', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 368, 'bleu_score': 0.9645876452711911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3736005617195771199}, 'section': 'Section::::Abstract.'}]}]