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.

Q: original question: What is the HUD county place for [Toa Baja]?
answer: toa baja / county place 729137
answer type: HUD County Place.
auxiliary information: Toa Baja is a municipality of Puerto Rico located in the northern coast, north of Toa Alta and Bayam√≥n; east of Dorado; and west of Cata√±o. Toa Baja is spread over 5 wards, including Toa Baja Pueblo. It is part of the San Juan-Caguas-Guaynabo Metropolitan Statistical Area. Toa Baja considered to be a part of the Metropolitan Area. It shares its metropolitan area status with San Juan, Bayam√≥n, Guaynabo, Cata√±o, Carolina and Trujillo Alto. Toa Baja is located fifteen minutes by car from San Juan and one hour from Ponce.

A: Name the HUD county place for [Toa Baja].
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Q: original question: What is the profession of [Musical Artist]?
answer: singer, performer, singer-songwriter...
answer type: Profession.
auxiliary information: A musical artist can be an individual or a group that performs or makes music. Musical artists should typically have performed in front of an audience on a regular basis or have recorded musical tracks or musical albums.  For more information, please see the Freebase wiki page on musical artist.

A: Which is the profession of [Musical Artist]?
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Q: original question: What fuel did the engine on [Space Shuttle main engine] use?
answer: ammonia, liquid hydrogen, kerosene...
answer type: Rocket engine fuel.
auxiliary information: The Aerojet Rocketdyne RS-25, otherwise known as the Space Shuttle Main Engine, is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is planned to be used on its successor, the Space Launch System. Built in the United States by Rocketdyne, the RS-25 burns cryogenic liquid hydrogen & liquid oxygen propellants, with each engine producing 1,859 kN of thrust at liftoff. Although the RS-25 can trace its heritage back to the 1960s, concerted development of the engine began in the 1970s, with the first flight, STS-1, occurring on April 12, 1981. The RS-25 has undergone several upgrades over its operational history to improve the engine's reliability, safety and maintenance load. The engine produces a specific impulse of 452 seconds in a vacuum, or 366 seconds at sea level, has a mass of approximately 3.5 tonnes, and is capable of throttling between 67% and 109% of its rated power level in one-percent increments. The RS-25 operates under temperatures ranging from ‚àí253 ¬∞C to 3,315 ¬∞C. On the Space Shuttle, the RS-25 was used in clusters of three engines mounted in the aft structure of the Orbiter, with fuel being drawn from the external tank.

A:
What type of fuel ran the engine on [Space Shuttle main engine]?
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