<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 main function of the nucleus in a cell? Context: The main function of the nucleus in a cell is to store and protect the DNA. Answer: [/INST]The main function of the nucleus in a cell is to store and protect the DNA.</s>