Question: how many episodes of channel zero butcher's block are there
[{'answer': '6', 'provenance': [{'wikipedia_id': '51184037', 'title': 'Channel Zero (TV series)', 'start_paragraph_id': 1, 'start_character': 178, 'end_paragraph_id': 1, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]