Question: how many episodes of walking dead season 4
[{'answer': '16 episodes', 'provenance': [{'wikipedia_id': '38981966', 'title': 'The Walking Dead (season 4)', 'start_paragraph_id': 1, 'start_character': 181, 'end_paragraph_id': 1, 'end_character': 192, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38981966', 'title': 'The Walking Dead (season 4)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 762, 'bleu_score': 0.963132435881702, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4759864610120014116}, 'section': 'Section::::Abstract.'}]}]