Question: what is absolute zero on the celsius temperature scale
[{'answer': '− 273.15 °'}, {'provenance': [{'wikipedia_id': '1418', 'title': 'Absolute zero', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 724, 'bleu_score': 0.8081791734178501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17143573504305644390}, 'section': 'Section::::Abstract.'}]}]