Question: how many episodes in season 4 of rectify
[{'answer': '8', 'provenance': [{'wikipedia_id': '39436329', 'title': 'List of Rectify episodes', 'start_paragraph_id': 1, 'start_character': 180, 'end_paragraph_id': 1, 'end_character': 181, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]