Question: how many episodes are in season 4 of htgawm
[{'answer': '8', 'provenance': [{'wikipedia_id': '53496873', 'title': 'How to Get Away with Murder (season 4)', 'start_paragraph_id': 1, 'start_character': 164, 'end_paragraph_id': 1, 'end_character': 165, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]