<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 a cantilever beam? Context: A cantilever beam is a beam that is supported only at one end. Answer: [/INST]A beam that is supported only at one end.</s>