<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 different types of rocks? Context: Igneous, sedimentary, and metamorphic rocks are the three main types of rocks. Answer: [/INST]The three main types of rocks are igneous, sedimentary, and metamorphic rocks.</s>