Question: which law of thermodynamics is based on the conservation of energy law
[{'answer': 'First law of thermodynamics', 'provenance': [{'wikipedia_id': '778700', 'title': 'Laws of thermodynamics', 'start_paragraph_id': 3, 'start_character': 12, 'end_paragraph_id': 3, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]