Question: when does part 2 of vikings season 4 start
[{'answer': 'November 30 , 2016', 'provenance': [{'wikipedia_id': '46238594', 'title': 'Vikings (season 4)', 'start_paragraph_id': 2, 'start_character': 132, 'end_paragraph_id': 2, 'end_character': 150, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]