Question: when did cod world at war come out
[{'answer': 'November 11 , 2008', 'provenance': [{'wikipedia_id': '20198488', 'title': 'Call of Duty: World at War', 'start_paragraph_id': 48, 'start_character': 65, 'end_paragraph_id': 48, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Other versions.:Nintendo DS.\n'}]}]