<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:  Who discovered the first fossil of a dinosaur? Context: The first fossil of a dinosaur was discovered by Mary Ann Mantell in 1822. Answer: [/INST]The first fossil of a dinosaur was discovered by Mary Ann Mantell in 1822.</s>