<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 focus of NASA's Mars Exploration Program? Context: NASA's Mars Exploration Program primarily focuses on studying Martian climate and geology, collecting samples, and preparing for human exploration. Answer: [/INST]The main focus is to study the Martian climate and geology, collect samples, and pave the way for human exploration.</s>