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 type of vehicle does the [Howth-Bray] transit line use?
answer: passenger rail terminology
answer type: Transit Vehicle Type.
auxiliary information: DART line going from Howth to Bray.

A: What vehicle does [Howth-Bray] use?
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Q: original question: How many kingdoms are governed by [Elizabeth II]?
answer: 16
answer type: Kingdom.
auxiliary information: Elizabeth II is the Queen of 16 of the 53 member states in the Commonwealth of Nations. She is Head of the Commonwealth and Supreme Governor of the Church of England. Upon her accession on 6 February 1952, Elizabeth became Head of the Commonwealth and queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon. Her coronation service the following year was the first to be televised. From 1956 to 1992, the number of her realms varied as territories gained independence and some realms became republics. Today, in addition to the first four of the aforementioned countries, Elizabeth is Queen of Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis. She is the world's oldest reigning monarch as well as Britain's longest-lived. If still reigning on 10 September 2015, she will have become the longest-reigning British head of state and the longest-reigning female monarch in history, surpassing Queen Victoria.

A: How many kingdoms are governed by [Elizabeth II]?
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Q: original question: Which astronomical discovery use [Doppler spectroscopy (radial velocity)]?
answer: hd 102272 c, hd 68988 b, hd 12661 c...
answer type: Astronomical Discovery.
auxiliary information: Doppler spectroscopy is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star. About half of the extrasolar planets known were discovered using Doppler spectroscopy, as of October 2012.

A:
in what astronomical discovery is it used [Doppler spectroscopy (radial velocity)]?
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