Question: 1 ton is equal to how many btu
[{'answer': '12,000 BTU / h'}, {'provenance': [{'wikipedia_id': '3403459', 'title': 'Ton of refrigeration', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 229, 'bleu_score': 0.6700813200598791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7682879450648911904}, 'section': 'Section::::Abstract.'}]}]