<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 some key factors to consider in urban planning? Context: Key factors in urban planning include population density, land use, transportation systems, and environmental sustainability. Answer: [/INST]Factors such as population density, land use, transportation systems, and environmental sustainability are important considerations in urban planning.</s>