instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Three many families are known quarks divided into.
answer:
How many families are known quarks divided into?


question:
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
answer:
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?


question:
Meiosis is part of the process of gametogenesis, which is the production of sperm and eggs.
answer:

Meiosis is part of the process of gametogenesis, which is the production of what?