<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 the definition of mechanical engineering? Context: Mechanical engineering is the branch of engineering that involves the design, analysis, and production of machinery, engines, and other mechanical systems. Answer: [/INST]Mechanical engineering is the branch of engineering that involves the design, analysis, and production of machinery, engines, and other mechanical systems.</s>