<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 are the different types of marine mammals? Context: There are different types of marine mammals including cetaceans, pinnipeds, sirenians, and polar bears. Answer: [/INST]Marine mammals include cetaceans (whales, dolphins, and porpoises), pinnipeds (seals, sea lions, and walruses), sirenians (manatees and dugongs), and polar bears.</s>