Definition: Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
Input: original question: What type of propulsion does [RMS Lusitania] use?
answer: steam turbine
answer type: Means of propulsion.
auxiliary information: RMS Lusitania was a British ocean liner, holder of the Blue Riband, and briefly the world's largest passenger ship. She was launched by the Cunard Line in 1906, at a time of fierce competition for the North Atlantic trade. On 7 May 1915, she was torpedoed and sunk by a German U-boat, causing the deaths of 1,198 passengers and crew. She had made a total of 202 trans-Atlantic crossings. German shipping lines were aggressive competitors in the transatlantic trade, and Cunard responded by trying to outdo them in speed, capacity and luxury. Lusitania and her running mate Mauretania were fitted with revolutionary new turbine engines, able to maintain a service speed of 25 knots. Equipped with lifts, wireless telegraph and electric light, they provided 50% more passenger space than any other ship, and the first class decks were noted for their sumptuous furnishings. When the RMS Lusitania left New York for Liverpool on what would be her final voyage on 1 May 1915, submarine warfare was intensifying in the Atlantic.

[RMS Lusitania] uses which kind of propulsion?