<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 concept of existentialism ? Context: Existentialism is a philosophical theory that focuses on individual existence, freedom, and choice. Answer: [/INST]Existentialism is a philosophical theory that emphasizes the individual's existence, freedom, and choice.</s>