<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 purpose of a game prototype? Context: The main purpose of a game prototype is to test and refine game mechanics. Answer: [/INST]To test and refine game mechanics.</s>