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

Example Input: When the phosphorus element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air
Example Output: When what element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air?

Example Input: Simple carbohydrates can be classified in terms of chain length.
Example Output: Which carbohydrates can be classified in terms of chain length?

Example Input: Conifers are the most prevalent type of gymnosperms.
Example Output:
Conifers are the most prevalent type of what plant group?