<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 are the key elements of urban planning? Context: Urban planning encompasses key elements such as land use, infrastructure, transportation, housing, and sustainability. Answer: [/INST]The key elements of urban planning include land use, infrastructure, transportation, housing, and sustainability.</s>