Question: when was back to the future released on vhs
[{'answer': '1986', 'provenance': [{'wikipedia_id': '42993', 'title': 'Back to the Future', 'start_paragraph_id': 48, 'start_character': 37, 'end_paragraph_id': 48, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '42993', 'title': 'Back to the Future', 'start_paragraph_id': 48, 'start_character': 0, 'end_paragraph_id': 48, 'end_character': 251, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13893798452218790041}, 'section': 'Section::::Release.\n'}]}]