Question: second season of stranger things how many episodes
[{'answer': 'nine', 'provenance': [{'wikipedia_id': '46301800', 'title': 'Stranger Things', 'start_paragraph_id': 4, 'start_character': 255, 'end_paragraph_id': 4, 'end_character': 259, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46301800', 'title': 'Stranger Things', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 722, 'bleu_score': 0.605766069219264, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12214626039558199520}, 'section': 'Section::::Abstract.'}]}]