<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:  How many types of renewable energy sources are there? Context: There are five main types of renewable energy sources. Answer: [/INST]There are five main types of renewable energy sources.</s>