Question: how many episodes are in the second season of stranger things
[{'answer': 'nine episodes', 'provenance': [{'wikipedia_id': '46301800', 'title': 'Stranger Things', 'start_paragraph_id': 4, 'start_character': 255, 'end_paragraph_id': 4, 'end_character': 268, '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': 0.5854936625938051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18181414935358033704}, 'section': 'Section::::Abstract.'}]}]