<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 blockchain technology used for? Context: Blockchain technology is utilized for secure and transparent transactions via decentralized ledger systems. Answer: [/INST]Blockchain technology is used for secure and transparent transactions through decentralized ledger systems.</s>