<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is Quantum Mechanics? Context: Quantum Mechanics is a fundamental theory in physics that describes the behavior of nature on the smallest scales of energy levels of atoms and subatomic particles. Answer: [/INST]A fundamental theory in physics that describes the behavior of nature on the smallest scales of energy levels of atoms and subatomic particles.</s>