<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 source of renewable energy? Context: Solar power is the main source of renewable energy. Answer: [/INST]The main source of renewable energy is solar power.</s>