Given a statement, generate a question such that the answer is contained in that statement.

[EX Q]: fissures need calcium to heal
[EX A]: What is needed to heal fissures?

[EX Q]: Octopuses use ink for hiding from sharks.
[EX A]: What do Octopuses use for hiding from sharks?

[EX Q]: eagle eggs are hard shells
[EX A]:
What type of shells are eagle eggs?