Question: when does the 5th season of vikings start
[{'answer': 'November 29 , 2017', 'provenance': [{'wikipedia_id': '49829845', 'title': 'Vikings (season 5)', 'start_paragraph_id': 1, 'start_character': 82, 'end_paragraph_id': 1, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]