Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: Carbon 14 isotope of carbon is typically used to date ancient items.

A: What isotope of carbon is typically used to date ancient items?
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Q: How much is involved in the reaction does the coefficient in front of an element in a formula indicate.

A: What does the coefficient in front of an element in a formula indicate?
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Q: Eukaryotic cells contain organelles that possess special functions.

A:
Eukaryotic cells contain what type of structures that possess special functions?
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