Question: when did the vikings win the nfc north
[{'answer': '2008', 'provenance': [{'wikipedia_id': '1768295', 'title': 'NFC North', 'start_paragraph_id': 3, 'start_character': 1063, 'end_paragraph_id': 3, 'end_character': 1067, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '2009'}, {'answer': '2015'}, {'answer': '2017'}]