Question: how many episodes of stranger things is there
[{'answer': '17', 'provenance': [{'wikipedia_id': '46301800', 'title': 'Stranger Things', 'start_paragraph_id': 4, 'start_character': 299, 'end_paragraph_id': 4, 'end_character': 301, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]