TASK DEFINITION: Given a statement, generate a question such that the answer is contained in that statement.
PROBLEM: talons are used to catch mice by some predators

SOLUTION: What are used to catch mice by some predators?

PROBLEM: Smog is made up of carbon particles.

SOLUTION: What is smog made up of?

PROBLEM: Unmelted winter snow and ice buried the earth

SOLUTION:
What buried the earth?