Question: what is the value of absolute zero on the celsius 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': 16967244200834364991}, 'section': 'Section::::Abstract.'}]}]