Question: what year did assassins creed black flag come out
[{'answer': '2013', 'provenance': [{'wikipedia_id': '38666874', 'title': "Assassin's Creed IV: Black Flag", 'start_paragraph_id': 1, 'start_character': 397, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38666874', 'title': "Assassin's Creed IV: Black Flag", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 470, 'bleu_score': 0.858973856069257, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1878165853581967167}, 'section': 'Section::::Abstract.'}]}]