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

[Q]: The cell starting meiosis is called a primary oocyte.
[A]: The cell starting meiosis is called a what?


[Q]: The long bone work as lever.
[A]: What type of function does the long bone perform?


[Q]: Medium is the matter through which sound waves travel.
[A]:
What is the matter through which sound waves travel?