<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 difference between top-down and bottom-up parsing? Context: Top-down parsing starts from highest level to lowest, while bottom-up parsing starts from lowest level to highest. Answer: [/INST]Top-down parsing starts with the highest level of abstraction and works down to the lowest level, while bottom-up parsing starts with the lowest level of abstraction and works up to the highest level.</s>