Question: when did game of thrones season 7 come out on dvd
[{'answer': 'December 12 , 2017', 'provenance': [{'wikipedia_id': '47398513', 'title': 'Game of Thrones (season 7)', 'start_paragraph_id': 79, 'start_character': 58, 'end_paragraph_id': 79, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Release.:Home media.\n'}]}, {'provenance': [{'wikipedia_id': '47398513', 'title': 'Game of Thrones (season 7)', 'start_paragraph_id': 79, 'start_character': 0, 'end_paragraph_id': 79, 'end_character': 75, 'bleu_score': 0.8781879837907131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11811500591393697163}, 'section': 'Section::::Release.:Home media.\n'}]}]