<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 concept of social stratification in sociology? Context: Social stratification in sociology is the division of society into different layers based on factors like wealth, power, and prestige. Answer: [/INST]Social stratification is the division of society into different layers based on factors like wealth, power, and prestige.</s>