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

[Q]: Lead sulfate is the white solid that forms on corroded battery terminals.
[A]: What is the white solid that forms on corroded battery terminals?

[Q]: Pleiotropic effects causes symptoms associated with sickle-cell disease.
[A]: What causes symptoms associated with sickle-cell disease?

[Q]: Varves type of stratified deposit is formed where lakes are covered by ice in the winter.
[A]:
What type of stratified deposit is formed where lakes are covered by ice in the winter?