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

[EX Q]: platypus usually have nests
[EX A]: What do platypus usually have?

[EX Q]: Vinegar changes the color of litmus paper from blue to red
[EX A]: What color does Vinegar change the color of litmus paper from blue to?

[EX Q]: Forming fossil fuels requires decomposing vegetation.
[EX A]:
What is required to form fossil fuels?