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

[EX Q]: Transparent matter transmits light without scattering it.
[EX A]: What type of matter transmits light without scattering it?

[EX Q]: Single-celled eukaryotes that share some traits with animals are also called?
[EX A]: Single-celled eukaryotes that share some traits with animals are also called?

[EX Q]: Gardasil is the vaccine to prevent infection of hpv.
[EX A]:
What is the vaccine to prevent infection of hpv?