<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 common challenges faced in urban planning? Context: Common challenges in urban planning include managing population growth, maintaining infrastructure, ensuring affordable housing, promoting sustainability, and addressing inequality. Answer: [/INST]Some common challenges in urban planning include managing population growth, maintaining infrastructure, ensuring affordable housing, promoting sustainability, and addressing inequality.</s>