[{"role": "user", "content": "I'm studying a textbook and I came across the sentence 'That's the theory' - could you please translate it into Italian for me so I can better understand the concept?"}, {"role": "assistant", "content": "The translation of 'That's the theory' in Italian is '\u00c8 la teoria.' This phrase is often used to indicate that a particular idea or explanation is the theoretical basis for something, and it can help you understand the concept better in the context of your textbook."}]