Question: when was season one of stranger things released
[{'answer': 'July 15 , 2016', 'provenance': [{'wikipedia_id': '46301800', 'title': 'Stranger Things', 'start_paragraph_id': 54, 'start_character': 103, 'end_paragraph_id': 54, 'end_character': 117, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '46301800', 'title': 'Stranger Things', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 722, 'bleu_score': 0.50720154089336, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11120864510901094803}, 'section': 'Section::::Abstract.'}]}]