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

[EX Q]: Carbon atoms have six neutrons as well as six protons.
[EX A]: Carbon atoms have six neutrons as well as how many protons?

[EX Q]: Salt-water biomes in the ocean are called marine biomes.
[EX A]: Salt-water biomes in the ocean are called what?

[EX Q]: Epididymis is the third male reprodutive structure after the penis and testes.
[EX A]:
What is the third male reprodutive structure after the penis and testes?