<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 does a robotic vacuum cleaner work? Context: Robotic vacuum cleaners work by using sensors to navigate and clean floors autonomously. Answer: [/INST]A robotic vacuum cleaner uses sensors to navigate and clean floors autonomously.</s>