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

Input: Consider Input: front paws are used to catch prey by some cats.

Output: Who catch prey?

Input: Consider Input: The ground sloth lived when the planet was buried in snow and ice.

Output: Where was the ground sloth buried?

Input: Consider Input: detailed observation of galaxies requires light
Output: What is required for detailed observation of galaxies?