Question: when does thor ragnor come out on dvd
[{'answer': 'February 20 , 2018', 'provenance': [{'wikipedia_id': '41974555', 'title': 'Thor: Ragnarok', 'start_paragraph_id': 59, 'start_character': 95, 'end_paragraph_id': 59, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Release.:Home media.\n'}]}, {'provenance': [{'wikipedia_id': '41974555', 'title': 'Thor: Ragnarok', 'start_paragraph_id': 59, 'start_character': 0, 'end_paragraph_id': 59, 'end_character': 909, 'bleu_score': 0.9141642714737791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7913223699921024394}, 'section': 'Section::::Release.:Home media.\n'}]}]