instruction:
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.
question:
original question: which rock type have [Eye of the Needle] formations?
answer: sandstone
answer type: Rock type.
auxiliary information: Eye of the Needle was a sandstone natural arch located along the Missouri River near Fort Benton, Montana. At some point around 1997, it experienced considerable damage, though the cause of that damage is unclear.
answer:
Which type of rock has a natural [Eye of the Needle] formation?


question:
original question: Who created [Alliance-Union universe]?
answer: c. j. cherryh
answer type: Fictional universe creator.
auxiliary information: The Alliance-Union universe is a fictional universe created by science fiction and fantasy author C. J. Cherryh. It is the setting for a future history series extending from the 21st century out into the far future. To date, the corpus of the Alliance-Union universe consists of 27 science fiction novels along with a series of seven short story anthologies edited by Cherryh and a few other miscellaneous works. It encompasses both books for which Cherryh won the Hugo Award for Best Novel, Downbelow Station and Cyteen, and also incorporates various other series books such as the Faded Sun trilogy, the Chanur novels, the four Morgaine books, and the Merovingen Nights shared universe series.
answer:
[Alliance-Union universe] was created by whom?


question:
original question: Which product ingredient is a variety of [Sugar substitute]?
answer: glycerol
answer type: Product ingredient.
auxiliary information: A sugar substitute is a food additive that provides a sweet taste like that of sugar while containing significantly less food energy. Some sugar substitutes are natural and some are synthetic. Those that are not natural are, in general, called artificial sweeteners. An important class of sugar substitutes is known as high-intensity sweeteners. These are compounds with many times the sweetness of sucrose, common table sugar. As a result, much less sweetener is required and energy contribution is often negligible. The sensation of sweetness caused by these compounds is sometimes notably different from sucrose, so they are often used in complex mixtures that achieve the most natural sweet sensation. If the sucrose that is replaced has contributed to the texture of the product, then a bulking agent is often also needed. This may be seen in soft drinks or sweet tea that are labeled as "diet" or "light" that contain artificial sweeteners and often have notably different mouthfeel, or in table sugar replacements that mix maltodextrins with an intense sweetener to achieve satisfactory texture sensation.
answer:

Varieties of [Sugar substitute] include which product ingredient?