Question: The inventor of Mayer's reagent and one of the founders of thermodynamics, Julius von Mayer was the first to enunciate what phrase, known as the first law of thermodynamics?
{'answer': 'energy can be neither created nor destroyed', 'supporting_facts': [["Mayer's reagent", 0], ["Mayer's reagent", 3], ['Julius von Mayer', 1]]}