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: Which roller coaster has a propulsion of [Powered]?
answer: back at the barnyard hayride, runaway mine train, null...
answer type: Roller Coaster.
auxiliary information: A powered roller coaster is a railed amusement ride similar to a roller coaster. Unlike a true roller coaster, the train is powered through the entire course, rather than being allowed to coast after an initial lift or launch. This allows for both compact layouts that start out with curving hills, or long, extended layouts that would need too many lifts to be feasible. The most common manufacturers of powered coasters are Mack, Wisdom Rides, and Zamperla. Due to the family-oriented nature of the rides, height restrictions can be as little as 36 inches or taller for someone to ride. The most common model of powered coasters is the Zamperla Dragon coasters. Other installations include Casey Junior, Le Petit Train du Cirque at Disneyland Park, Thunder Run at Canada's Wonderland, Runaway Mine Train at Alton Towers and High in the Sky Seuss Trolley Train Ride at Islands of Adventure. The train on a powered coaster usually picks up electricity from contacts in the rails and may contain multiple motors. Some powered coasters are powered by a flexible cable connected to the train. Another component of powered coasters is an extra "track" in the center of the rails.

[Powered] is the propulsion for which roller coaster?